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BAHAGIAN PENGURUSAN SEKOLAH BERASRAMA PENUH SEKOLAH KECEMERLANGAN KEMENTERIAN PELAJARAN MALAYSIA MARKING SCHEME PERFECT SCORE & X A-PLUS MODULE PHYSICS 2012

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  1. 1. BAHAGIAN PENGURUSANSEKOLAH BERASRAMA PENUH SEKOLAH KECEMERLANGANKEMENTERIAN PELAJARAN MALAYSIAMARKING SCHEMEPERFECT SCORE & X A-PLUS MODULEPHYSICS 2012
  2. 2. SECTION II - COMMON MISTAKES AND MISCONCEPTIONS8.Physical QuantityPhysical quantity measuredPhysics Unit and symbolStop watchtime Second. s voltmeterVoltage, VVolt, V thermometertemperatureKelvin or oCelsiusBourdon gaugeGas pressure Pascal, Pa AmmeterElectric currentAmpere, A9. TermsCommon Mistake Correct Answer[The type of energywhen the object is at P]Gravitational Potential Energya Potential energy Force acting on surface area Force/area Normal force acting on a unit ofb Pressuresurface area A product of depth, density and gravitational accelerationPascals principle In a close container, force is In a close container, pressure isc transmitted equallytransmitted equally.Latent heat of Heat absorbed to change 1 kgdHeat absorbed to changevaporization of liquid to gas without any by 1oC changes in temperature.Amount of kinetic energy in aneTransfer from hot body toTemperature object cold body[Physics phenomena ina prism]Total internal reflectionfReflection
  3. 3. Terms Common Mistake Correct AnswerCritical angle is when theCritical angle is the incidentrefracted angle is 90oangle in denser medium whichg Critical angleCritical angle is the incidentproduces when the refractedangle when the reflectedangle in less dense medium isangle is 90o90oThe image that formedThe image that cannotbeh Virtual imagebehind the lensformed on the screen light of one frequency /i Monochromatic light A colour of one light wavelength / colour .. displacement of anyMaximum point of the particle/oscillating system fromj Amplitudehighest displacement its .. ..The time taken for any particlek PeriodOne complete oscillationto make one completeoscillation1000 W of energy is supplied1000 W of energy is consumedSpecification:l when the power supplied isin 1 s when connected to a 240240 V, 1000 W240 V.V power supply.When the current flow A conductor which can producethrough magnetj electromagnetmagnetic field when currentIs a combination of electric passes through it.and magnetic fieldk Beta particlesNegative charge Fast moving electron
  4. 4. B. Misconceptians Examples: Num MisconceptionsCorrectionOil is used in hydraulic jack because it has1.. because it is not easily evaporate.higher boiling pointSnells law state that:The sine of incident2The sine of incident angle = constant angleRefractive The sine of =refracted angle The sine of refractedindex angleContainer AContainer B water Pressure at X = Pressure at Y because X and Y are at the same depth, same3gravitational acceleration and in the same type of liquid that has same density.The force exerted at X > the force exerted at( P = hg)Y because smaller surface area (P = F /A) To increase the efficiency of ac/dc GENERATOR: Generator the current is induced - Use more number of turns to produce stronger magnetic fieldThe ship can float in sea water becausethe total density of the ship is less thanthe density of waterThe buoyant force is equals to the totalweight of the ship The ship can float in sea water because the buoyant force is bigger than the weight of the ship
  5. 5. C. Paper 3 1. Data TabulationTitle - no unitContent-not consistentExample:Common Mistake Correct AnswerElectric Current VoltageElectric Current, I (A) Voltage, V (V)0.10.5 0.100.50.1210.121.00.14 1.5 0.141.5TOV 1 SPM FORMAT SET 14531/2 SECTION AQuestion 5NoAnswer SchemeMarka The force that gravitation exerts upon a body 1b(i)The mass of slotted weigh in Diagram 5.1 > Diagram 5.21b(ii) The nett force in Diagram 5.2 > Diagram 5.1 1b(iii)The acceleration in Diagram 5.2 > Diagram 5.1 1c The greater the nett force , the greater the acceleration 1d(i)Net force in Diagram 5.1 > Diagram 5.31d(ii) The acceleration in Diagram 5.1 > Diagram 5.3 1d(iii)The weight of 20 N in Diagram 5.1 is perpendicular to the tension of the string 1Question 6NoAnswer SchemeMarkDiagram 6.1 : no relative motiona(i)2Diagram 6.2 : there is a relative motiona(ii) Number of turns in Diagram 6.3 > Diagram 6.21b(i)The greater the number of turn of coil, the greater the change in magnetic flux 1The greater the number of turn of coil, the greater the magnitude of inducedb(ii) 1currentc Faradays Law 1When the magnet is pulled away from the coild Reason : the current will flow in such direction that oppose the change that2cause it
  6. 6. Question 7 NoAnswer SchemeMark aDepth of water 1P = hg5 b = 2.5 x 103 x 102 = 2.5 x 104 N m-2 cLess different of water pressure 1Place the water tank P higher than water tank R // use water pump d(i)2It will increase the water pressure // sufficient water supplyBigger base area //thicker wall at the bottom d(ii) 2Less pressure exerted on the ground // could withstand water pressureLow density material // fiber tank d(iii)2Light // can withstand stronger pressureQuestion 8No Answer SchemeMark1.(a)Atmospheric pressure is the weight of the atmosphere on an object 1(b)1. Vacuum pump is used to pump out the air from the suction cup 3 2. Partial vacuum is created in the suction cup 3. Higher atmospheric pressure push the glass sheet onto the suction cup1(c)(i) Low pressure1 (ii)Larger difference in pressure 1 (iii) Big diameter cup1 (iv)Greater force 1(d) Triple cups 1 Greater force 1 R 1 Straw/syringe/siphon/vacuum cleaner 12Question 9 NoAnswer SchemeMark aThe force exerted by the gas molecules onto a unit of surface area 1When temperature increases, the average kinetic energy increases Rate of collision also increaseb4 Rate of change of momentum increase Force exerted on a unit of surface area increaseTemperature of gas : 9.3 > 9.2c5Volume of gas: 9.3 = 9.2
  7. 7. NoAnswer Scheme Mark Reading of pressure gauge : 9.2 < 9.3 Temperature increase, reading of pressure gauge Pressure Law CharacteristicsExplaination Rate of rotation is less // Temperature does notLarge radiusincrease easily Increase the surface area // less pressure Many tyresdProvide a gripping surface10Tyres with treads Prevent from deformation Strong tyreCan withstand high temperatureHigh melting pointQuestion 10No Answer SchemeMark Electromagnetic induction 1ab4 Number of turns of coil : Diagram 10.3 > Diagram 10.4 Speed of magnet : samecDeflection of galvanometer : Diagram 10.3 > 10.45 When number of turns of coil increased, deflection also increased Faradays LawCharacteristicsExplainationCurve magnet Produce radial magnetic fieldStronger magnetProduce stronger magnetic fieldd Replace component X10 Current is induced in one directionwith commutator Good conductorCopper wire coilThick copper wireLess resistance
  8. 8. Question 11(a)Distance between optical centre and focal point(b)(i)M1 correct substitution into formula or correct answer M = v/u = 60/20 = 3(b)(ii) M1 correct substitution into formula:11 11 1= + = + 20 60 M2Answer with correct unit f = 15 cm = 0.15 m(b)(iii)M1: P = 100/f = 100/15M2: Answer with correct unit: = 6.67 D(c)M1: Parallel light rays from the hot sun at infinity pass through a convex lens// labeled diagramM2: Light rays are focused after passing through the lens // labeled diagramM3: Light rays are converged onto a focal point of the lensM4:At the point, the intensity of lights is great (and the light energy) causes an increases in temperature. When the spot on the paper become hot enough, the paper start to burn // light energy change to heat energy.Aspect ReasonFocal length is longer // eyepiece must be more longer focal Low power of eye piecelength than objective lensFocal length is shorter / objective lens must be powerful lens High power objective lensthan eyepiece lens// Objective lens must be shorter focallength than eyepiece lens. Distance between lenses :To produce bigger image from the eyepiece // to increase >fo + fe the magnification Position of the specimen : fo
  9. 9. Question 12Answer:(a) frequency(b) 1 High pitch, high frequency / pitch directly propotional to frequency2 frequency is inversly propotional to wave length // high frequency has shorterwave length3 Short / high f / high pith at C, will diffract / spread out/ bend less4 Sound easily diffracted / bending / spread out during low pitch/ low f/long / at A,B,C(c)Characteristic Reason Large diameter Receive more signal Same as focal length Signal are focused/converged to the receiver Microwave Has high frequency / high energy The signal is not blocked / easy to beHighdetectedChoose K because Because it has large diameter, Same as focal length, use microwave and locate at high position.(d)(i) v = 2s/t = (2 x 90)/0.12 = 1 500 m/s (i) V = f = 1 500/50 000 = 0.03 m = 3 cmTOV 2 SPM FORMAT SET 24531/2 SECTION AQUESTION 5No Answer Scheme MarkaThe size of the coin in Diagram 6.1 < Diagram 6.2 1bRefraction of light wave2 Light travels from water to air // denser to less dense mediumcLight is refracted away from normal line3 The image is seen bigger and closer to the observer eye n = rd/ad = H/hdh = 16/(4/3)2 = 12 cmeUse liquid with bigger refractive index 1
  10. 10. QUESTION 6No Answer SchemeMark 1a(i) Kinetic energy to electric energy Rotating coil will cut the magnetic fluxa(ii)Emf is produced 3 The commutatorwii ensure the current flow in one directionb(i) The ratio Np : Ns is 6 : 11b(ii)diode 1 Capacitorb(iii) 2 Reason : it can store and discharge charges Copper wire // laminated iron corec2 Reason : good conductor // reduce eddy currentQUESTION 7No Answer SchemeMarkaTemperature increases 2Pressure increasesbWhen temperature increases, the average kinetic energy increases3Rate of collision also increaseRate of change of momentum increaseForce exerted on a unit of surface area increase c)P1 = 200 kPaT1 = 273 + 30 = 303 KP2 = 225 kPaT2 = (T1P2)/ P1 = (303 x225) /200 3= 340.875 Kd(i) More1d(ii) Able to support greater mass // heavier load 1d(iii)Grips efficiently1
  11. 11. QUESTION 8No Answer Scheme Mark (a) Concave mirror 1 (b) 1. Object between F and pole of mirror 4 2. Light parallel to principal axis reflected to F 3. Light through C reflect back original path 4. Extend the lines to back of mirror and draw a virtual image (c)(i) Concave 1(ii) To focus light 1 Big size 1(iii) To collect and reflect more light1(iv) At focal point of the mirror 1 Light/energy will focus after light reflected1 Z1 12QUESTION 9No Answer Scheme MarkReal image is an image which can be formed / projected on a screen. 1 a(i)object distance in 9.1 is shorter than 9.2Size of image formed in 9.1 is bigger than in 9.2 a(ii)Image distance in 9.1 is smaller /shorter 5The shorter the object distance, the bigger the size of the image formedWhen the object distance is shorter, the magnification scale is bigger.Pb 4 1. Object is placed between F and P 2. Parallel light ray from top of object to mirror and reflected to F 3. Light ray from top to mirror and reflected back to C 4. Extrapolation of both rays and its intersection behind the mirror and anupright image is drawn.
  12. 12. NoAnswer Scheme Mark suggestion Explanation Higher intensity of light / more light Use higher power bulb produced. The filament of the bulbis at the focus point ofThe light ray focuses to one point.d10the concave mirrorMore curvatureIncrease the intensity. To produce real and enlarge / biggerlens between f and 2f images. Increase the distance /Larger image produced further away the screenQUESTION 10No Answer SchemeMark 10(a) Monochromatic light: light of one frequency / wavelength /1 colour (b) In figure 10.1(a), distance between the double slit and 1screen, D is smaller In figure 10.1(b), distance between two successive bright 1fringes, x is smaller In figure 10.1(b), the number of fringes is bigger / more 1fringes In figure 10.1(b), the width of fringes is smaller / narrower 1 When the distance between the double slit and screen, D1increases, the distance between two successive fringes, xincreases.5 (c) Microwaves are transmitted by the radar 1 the radar transmits the signal towards the aeroplane1 it detects the reflected signal from the aeroplane t seconds1later. calculate the distance of aeroplane from the radar,s by 1using formula s = vt/2, where v is the speed of microwavesin air. 4
  13. 13. AnswerNo Answer SchemeSchemeModification Explanation Shape of the boat is To reduce the water resistance / dragstreamline Material used is Can withstands high water pressurestrong Uses ultrasonic Have high energy / sounds can travel at furtherwavesdistance Put fish in a Ice has larger latent heat / ice can absorb a largepolisterine boxquantity of heat from fish as it melts / fish can becontaining ice kept at a low temperature for an extended period of time Made of fiber glass The boat is lighter/ less densematerial10TOTAL20QUESTION 11NoAnswer Scheme Mark11(a) Volume = area x height11st : pressure of air is inversely proportional to the volume of air2nd : the pressure inside the air bubbles is equal to the water pressure which is high atthe bottom(b)3rd : so the volume of air bubbles is small.44th : as air bubble goes up to the surface, the pressure decreases., so the volume of airbubbles increases.1st : safety valve is needed2nd : to releases extra steam so that the pressure is the cooker does not reach adangerous stage3rd : Thickness of the pot is high(c)4th : to withstand high pressure105th : specific heat capacity of the pot is low6th : heats up quickly and food will be cooked faster7th : specific heat capacity of the handle is high
  14. 14. NoAnswer Scheme Mark8th : heats up slowly and can be held with bare hands9th : K is chosen10th : Reasons: It has a safety valve, high thickness, low specific heat capacity of the pot,high specific heat capacity of the handle1st : P1= 75 cm Hg, V1 = 10 cm2nd : P2 = 75 + 3 = 78 cm Hg(d) 3rd : P1V1 = P2V254th : (75)(10) = (78) (V)5th : V2 = 9.62 cmTOTAL 20
  15. 15. QUESTION 12
  16. 16. ExerciseNoAnswer SchemeMarka The force that gravitation exerts upon a body1Stone is denser than waterWhen the stone is immersed in the water , it experienced buoyant force, Fb4The tension which is the reading of spring balance, T = W-FArchimedes Principlei. 4.4.kgii. (44-36) = 8 Nc iii. F = Vg 5 V = F/(g)= 8/(103 x 10) = 8x10-4 m3 Characteristics Explaination Denser material So the hydrometer stand up right Large diameter of bulbDisplaced more acid// stay floating Long hydrometer To measure wide range of density of acidd10 Glass hydrometerDoes not react with acidThe best choice is U because it is denser material, large diameter of bulb,long hydrometer and glass hydrometerSECTION III UNDERSTANDING (Paper 2 Section B and C)Question 1 [ Introduction to Physics ] 1. Consistency is the ability of the instrument to give the same readings close to each other whenrepeated measurement are done 2. each measurement with little deviation among readings/ draw diagram bulls eye target. 3. Accuracy is the ability of an instrument to give a measured reading to the actual reading. 4. The value determined is accurate if it is near to the actual value/ draw diagram bulls eyetarget.Question 2 [Forces and Motion]1. Fuel burns in the combustion chamber2. Hot gases expelled at high speed / high momentum3. A large downwards momentum is produced4. The rocket gains upwards momentum of equal magnitude.Question 3 [Forces and Motion(i) Elasticity is the property of matter to return back to its original size or shape when the force thatacting on it is removed(ii)1. There are two types of force; attraction and repulsive force between the particles of the solid.2. When the solid is stretched, the molecules displaced away from each other3. Attractive forces are acting to oppose the stretching4. When the solid is compressed, the molecules displaced closer to each other5. Repulsive forces are acting to oppose the compression
  17. 17. Question 4 [Forces and Motion](ii) The force forward = friction The resultant force is zero The object move with constant velocityQuestion 5 [Forces and Pressure] 1. High altitude has low density of air 2. Air molecules has low temperature / low kinetic energy 3. Less collision of air molecules with surface 4. Rate of change of momentum decreases.Question 6 [Forces and Pressure] 1. When air is pumped out , pressure inside decrease. 2. Atmospheric pressure outside is higher 3. Difference in pressure produces a forceto lift the mirror 4. Force is greater than the weight of the mirror.Question 7 [Forces and Pressure] (a) (i) Archimedes Principle states that buoyant force equal to the weight of fluid displaced. (a) (ii) 1. Volume of air displaced equal to volume of aballoon 2. Density of air decreased as a altitude increase 3. Weight of displaced air becomes smaller 4. At certain height weight of displaced air equal to weight of the balloon.Question 8 [Forces and Pressure] 1. Hydrometer displaces water. 2. Weight of water displaced equal to weight of hydrometer. 3. The denser the liquid is, the less volume of water displaced. 4. Hydrometer will float higher.Question 9 [Heat](i) Thermal equilibrium occurs when the net transfer of heat between two objects in thermalcontact is zero.(ii) 1. Thermometer is placed in the boiling water.2. Heat is transferred from boiling water to the thermometer3. Thermal equilibrium between the thermometer and boiling is reached when thenet rate of heat transfer is zero.4. The thermometer and the boiling water are at the same temperature.
  18. 18. Question 10 [Heat]1. Molecules moving freely in random motion2. When temperature increase, kinetic energy//velocity increase3. Molecules strike the walls of pressure cooker more frequently The rate of change of momentum increase4. Force exerted on the walls increase, pressure (P = F/A) increaseQuestion 11[Heat]1.The specific heat capacity of the land is less than sea water.2.During daytime, the land warms up faster than the sea.3.Air above the land becomes hot and less dense, so it will rise up.4.The cooler air from sea moves to the land.Question 12[Light]1. The air close to the surface is much colder than the air above it2. Light travels from denser to less dense medium3. Light rays refracted away from normal line and bend downward toward the surface/total internal reflection occur.4. The observer will see the image of the ship due to light travels in a straight line.Question 13 [Light]1. The parallel rays of the sun will pass through the a convex lens2. After entering the lens, the light rays is focused at the principal focus of the lens3. At the principal focus, the light ray is focused on one small area4. Heat energy causes an increase in temperature, the paper starts to burnQuestion 14 [Waves](i) Sonar is a reflected ultrasonic waves. (ultrasonic echoes)(ii) ultrasonic wave has a higher frequency waves , it has more energy so it can move furtherit do not produce noise(iii) 1. attach ultrasonic transmitter to a ship2. use a microphone receiver to detect ultrasonic pulses3. direct the ultrasonic pulses from the transmitter to the seabed4. use microphone receiver to pick up the reflected pulses from the seabed5. measure the time taken by the pulses to travel to the seabed and return v x t6. calculate the depth of the water using the formula d 2Question 15 [Waves]1. The airplane engine produces noise which cause the air to vibrate2. All particles in a material/matter/glass vibrate at its natural frequency3. Due to resonance, the glass vibrate at a higher/maximum amplitude4. Need strong glasses to withstand the effect of resonance/ the strong vibration/ high amplitude, so that it does not break easily.Question 16 [Electricity]1. A parallel circuit can run several devices using the full voltage of the supply.2. If one device fails, the others will continue running normally3. If the device shorts, the other devices will receive no voltage, preventing overload damage.4. A failure of one component does not lead to the failure of the other components.5. More components may be added in parallel without the need for more voltage.
  19. 19. Question 17 [Electricity]1. The two dry cells are connected in parallel2. The effective e.m.f. remains the same3. The effective internal resistance of the two cells is smaller4. A larger current will flow through the bulb to make it brighterQuestion 18 [Electromagnetism]1. When the switch is on, the soft iron core becomes electromagnet. End A becomes north pole.2. End B becomes south pole3. Magnet P repels from end A4. Magnet Q attracts to end BQuestion 19 [Electromagnetism]1. The (magnadur) magnets produce a magnetic field / diagram2. The current in the wire produces a magnetic field / diagram3. The two magnetic fields interact/combine to form a resultant / catapult field / diagram4. Same direction of magnetic field produces stronger resultant magnetic field. Opposite direction cancel each other and produce weaker magnetic field.SNQuestion 20 [Electromagnetism]1. When too high current flow, magnetic field strength become very strong / wire expand2. electromagnet pull the soft iron armature / pulled to the right by spring P.3. release the catch, contact separate and current does not flow4. When reset button is pressed, spring Q pulls the soft iron armature back to its original positionQuestion 21 [Electromagnetism] (i)Ideal transformer is when the efficiency is 100% / power output equal to power input (ii) 1. When a.c. voltage is supplied to primary coil, (alternating current will flow) and the softiron core is magnetized.2. The magnet produced varies in magnitude and direction.3. This causes a changing magnetic flux pass through the secondary coil.4. An induced e.m.f. across the secondary coil is producedQuestion 22 [Electromagnetism] 1. Electric supply is continuous 2. Electric supply idepends on region, the region like city needs more electric supply than interior region. 3. Peak hour need more electric supply. 4. If one region black out, the source of electric supply can be taken from another region. 5. Reduce the cost. 6. Easy to manage and to repair * Choose any FOUR from the list.
  20. 20. Question 23 [Electronic] 1. Connect the dry cell terminal to the Y-input of CRO. 2. The Y-gain setting is recorded 3. The vertical displacement is measured = h. 4. Potential difference = ( Y-gain scale) x (Vertical displacement of direct current wave)Question 24 [Radioactivity]1. Put the radioactive source opposite the detector2. Detector is connected to the thickness indicator3. Detector detect the reading of the changes in counts4. Thickness is measured with the thickness indicator. If the reading of the detector is less than thespecified value, the thickness of the paper is too tick/ vice versaQuestion 25 [Radioactivity](a) Unstable isotopes which decay and emit radioactive particles / ray(b)1. Radioisotope is injected into the pipe2. G-M tube as detector is used to find the leakage3. Reading on detector increases when near a leakageQuestion 26 [Radioactivity]1. Neutron bombarded a uranium nucleus and produced three neutral2 The new neutron bombarded a new uranium nucleus3. For every reaction, the neutrons produced will generate a chain reaction4. Diagram of chain reaction
  21. 21. SECTION IV DECISION MAKING (Paper 2 Section A Question 8; Section C )Question 1Characteristics ExplanationStreamlined shape To reduce water resistanceHigh strength of metalTo withstand high water pressureWide base cross section areaSo that ship can float / prevent from overturn //ship more stable // ship not sink deeperHigh volume of air space in the shipIncrease buoyant forceStructure U Because it has streamlined ship, high strength ofmetal, wide base cross section area, high volumeof air space in the ship.Question 2 [Force and Pressure]SpecificationReasonStraight cut shape bottleMove faster/increase the speedThe body is streamline shape Reduce air frictionThe angle of launching is 450The rocket can achieve maximum distanceThe volume of water 1/3 of the bottleTo produce optimum momentum/speedThe rocket has functional fins Increase stabilityThe best water rocket is T,because it has straight cut shape, body is streamline, angle of launching is 450 the volume of water is1/3 of the bottle and the rocket has functional fins.Question3 [Force and Pressure]Specification ReasonWith ABSTo reduce jerking when it stopped immediately /can be controlled if direction changes / does notmove side waysWide tyresBetter support / more stable / safer when turnLow massLighter, can move faster / low inertiaLow seat height Lower centre of gravity / more stableC because it has ABS, wider tyres, low mass, low seat height.Question 4 SpecificationReasonHigh specific heat capacity The rate of temperature increased caused byfriction is lowHigh melting pointDoes not easily change in shape when thetemperature is highDifficult to compress Pressure will be transmitted uniformly in alldirections.Use ceramic Can withstand high temperature // less dustproducedS because it has high specific heat capacity, high melting point, difficult to compress and use ceramic.Question 5Specification ReasonSize of the tyre is large Prevent backhoe from sinking into soft groundNot easy compress compared to the gases // highFluids used in hydraulic system is liquidpowerLarge massAvoid backhoe from movingLarge base area Ensure that the backhoe will not collideSULIT 21
  22. 22. Centre of gravity is low More stableThe most suitable backhoe is M.Large tyre, fluids use in hydraulic system is liquid, large mass, large base area and the centre of gravityis low.Question 6 [Force and Pressure]SpecificationReasonA shape of cross section which is upper side is To produce the speed of airflow above the wingshigher Than the bottom//aerofoil to be higher than the speed of air belowLarge area of the wing The larger the lift forceLow density of the wing materialLess weight// produce more upward forceThe higher the difference in speed of air The higher the difference in pressureP was chosen because shape of aerofoil,large area of the wing,Low density of the wing and the higher the difference in speed of airQuestion 7[Force and Pressure]SpecificationReason Produced bigger buoyant force / displaced moreVolume of the balloon is bigger volume of airMaterial used for balloon is nylon Stronger / does not break easily Lighter / low mass / increase the time impact /Material used for basket is rattan reduce impulsive force Reduce the density of air / reduce the mass of airTemperature of air inside the balloon is higher in the balloon / increase upward resultant force / can carry more loadThe best chosen is K because volume of the balloon is bigger, material used for balloon is nylon,material used for basket is rattan and temperature of air inside the balloon is higherQuestion 8[Heat]Specification ReasonIt will not easily change into gas when absorb heatHigh boiling pointfrom the engineIt will not freeze during cold weather // can flow atLow viscouslylow temperatureIt can absorb a big quality of heat with small rise inHigh specific heat capacitytemperatureThe metal parts of the engine will not corrodeA low ability to react with metalseasilyK because of its high boiling point, low viscosity, high specific heat capacity and low ability to reactwith metals.Question 9 [light]Specification ReasonType of objective lens is convex lens To converge the light and produce real imageFocal length of the objective lens is big To get higher magnification powerD < f0 + fe To get virtual and magnified imageMore light can be captured, the image formed isDiameter of the objective lens is largebrighterLens S because lens used is convex lens, focal length of the objective lens is big, D D < f 0 + fe anddiameter of the objective lens is large.SULIT 22
  23. 23. Question10 [Electricity]SpecificationReasonThin diameterHigh resistanceCoil wireIncrease length / resistanceParallel arrangement If one panel not function, others still functionHigh melting point Withstand high temperatureG, because thin diameter, coil wire, parallel arrangement and high melting point.Question 11CharacteristicsExplanationCurved shape Produce radial magnetic fieldSoft ironEasily to magnetized and demagnetized Can detect small current // more sensitive // canSoft spring measured small current Uniform deflection // force produced directlyLinear scale proportional to current.T is chosen because curved shape, soft iron, soft spring and linear scale.Question 12Specification ReasonLow resistivity to reduce heat loss in the cablesLow density The cables will be lighterLow rate of oxidation Not easily rust / corrodeLow rate of thermal expansion The cables will not expand under hot weatherCable Q because it has low resistivity, low density, low rate of oxidation, low rate of thermal expansion.Question 13Specification ReasonLow density of the coil Lighter // less massThe rate of change of magnetic field, moreHigh frequency of rotationcurrent inducedUse 4 diodesFull wave rectification to get a d.cHeat capacitor in the circuit To smooth the direct current obtainedCircuit I because it has low density coil, high frequency of rotation, consist 4 diodes and has capacitorin the circuitSULIT 23
  24. 24. Question 14Specification ReasonWhen it is doped, the conductivity of theThe valency of the intrinsic semiconductor is 4semiconductor increasesValency of 3 is used to produce hole as majoritycharge carrier (P type) and valency of 5 is used toThe valency of the doping substance are 3 or 5produce electron as majority charge carrier (Ntype)Can maintain the crystallize structure of theSize of the atom of the doping substance is almostsubstance / give good effect in the dopingsame as the size of the substanceprocessSubstance T because the valency of the intrinsic semiconductor is 4, the valency of the dopingsubstance are 3 or 5 and the size of the doping substance is almost the same as the size of thesubstance.The type of pure semiconductor is silicon because it has greater power handling (not easy overheated.Question 15 [radioactive]Specification ReasonGamma Has high penetrating powerLong half lifeLong lastingSolid Easy to handleDoes not ionize healthy cells / does not cause cellLow ionizing powermutationK is chosen because it radiated gamma ray, the half life is long, the state of matter is solid and has lowionizing power.uestion 16 [Radioactive]Specification ReasonType of ray is AlphaStronger ionizing powerLong half lifeLong lastingState of matter is solidEasy to handle / does not spill or evaporateLogic gate: NOT To inverse inputL is chosen because type or ray is alpha, long half life, solid and use logic gate NOTSULIT 24
  25. 25. SECTION V CONCEPTUALIZATION (Paper 2 Section A Question 5/6; Section B )Question 1 [Force and Pressure]1. Density of sphere A is less than B2. Weight A is less than B3. The weight of water displaced by A is less than B4. The larger the weight of sphere, the bigger the weight of water displaced5. Weight of water displaced = upthrust // When the weight of water displaced increase, upthrust increaseQuestion 2 [Force and Pressure](a) Density is mass per unit volume(b) i Level of the boat is higher in the sea than in the river.ii Water displaced in the sea is less than in the river. iii Density of sea water is higher than river water.(c) i The lower the density of water, the greater the volume of water displaced. ii Weight of the boat = Weight of the water displaced(d) Archimedes principleQuestion 3 [Heat] (a)(i)The temperature of air increase The volume of air increase (ii)The mass of air constant(b)(i) When the temperature increase the volume of air increase (ii)Charles Law(iii)Temperature increases, kinetic energy increases The rate of collision between molecules and wall increases/ pressure increases To keep the pressure constant, volume increases/expandQuestion 4 [Waves](a) Length between the two crest / trough / consecutive wave front(b) (i) Wavelength in Diagram 4.2 is greater than 4.1(ii) Wavelength remains constant after passing through the gap(c) Curvature of the wave pattern in Diagram 4.2 is greater(d) The greater the wavelength, the more circular the wave pattern(e) DiffractionSULIT25
  26. 26. Question 5 [Electromagnetism](a) Diagram 5.1 has less number of turns compare to Diagram 5.2Deflection of pointer in Diagram 5.1 is smaller than Diagram 5.2(b) P = North Q = South(c) The larger the number of turns, the higher the induced current produced(d) Faradays Law(e) Increase the speed of the relative motion between the coil and the magnet //Use a stronger magnet(f) Direct Current Generator (D.C. Dynamo) //Alternating Current Generator (A.C. Dynamo) // Moving coil microphone // TransformerQuestion 6 [Force and Motion](a) The energy an object has because of its position.(b) Load in Diagram 6.1 is higher than in Diagram 6.2.Gravitational potential energy in Diagram 6.1 is higherWork done in Diagram 6.1 is greaterThe higher the position of the load, the greater the work doneThe greater the work done, the greater the gravitational potential energy //Work done = gravitational potential energyQuestion 7 [Force and Motion]1. Mass of the coin is greater than the leaf2. Both objects reach the ground at the same time3. The falling position of both objects is the same4. Gravitational acceleration is the same5. Gravitational acceleration does not depend on massQuestion 8 [Force and Pressure]1. Reading of spring balance in the oil/Diagram 8(c) is greater than in the water/Diagram 8(b)2. Weight lost in the water/Diagram 8(b)is greater than in oil/Diagram 8(c) // vise versa3. Density of water is greater than density of oil4. The greater the density of liquid, the greater the weight lost5. The greater the density of liquid, the greater the buoyant forceSULIT26
  27. 27. Question 9 [Force and Pressure]1. Density of air in Diagram 9(a) is higher than in Diagram 9(b)// vice versa2. The number of load in Diagram 9(a) is greater than in Diagram 9(b)// vice versa3. The height of the balloons in both Diagram 9(a) and Diagram 9(b) are equal4. When the density of the air increase, the buoyant force increase5. As the density of the air increase, the weight of the load carried increased// . As the density of the air decrease, the weight of the load carried also decreasedQuestion 10 [Force and Pressure]1. The mass of the fish is the same2. The volume of the fishing net immersed in the water is the least in Diagram 10.3 and the largest in Diagram 10.13. When the weight of water displaced is smaller, the force needed is greater4. Buoyant force is equal to weight of water displaced5. The greater the weight of water displaced, the greater the buoyant forceQuestion 11 [Light]1. Density of glass block in Diagram 11(a) is smaller than density of glass block in Diagram 11(b)2. Refractive index of glass block in Diagram 11(a) is smaller3. Angle of refraction in Diagram 11(a) is greater than angle of refraction in Diagram 11(b)4. The higher the density, the smaller the angle of refraction5. The higher the refractive index, the smaller the angle of refraction.Question 12 [Light]1. Lens K is thicker than lens J2. Light ray refracted more in lens K than lens J.3. Focal length of lens K is shorter than lens J.4. The thicker the lens, the greater the light refracted5. The thicker the lens, the shorter the focal lengthSULIT27
  28. 28. Question 13 [Light]1. Distance between the double-slit and screen, D, i n Diagram 13.1(a) is smaller2. Distance between two successive bright fringes, x, in Diagram 13.1(b), is smaller3. The number of fringes in Diagram 13.1(b) is bigger4. The width of fringes in Diagram 13.1(b) is smaller5. When the distance between the double-slit and screen, D, increases, the distancebetween two successive fringes, x, increasesQuestion 14 [Waves]1 . Number of oscillations in Diagram 14(a) is greater than in Diagram 14(b)2.The amplitude of the wave in Diagram 14(a) is the same as in Diagram 14(b)3 . The diameter of guitar string in Diagram 14(a) is smaller than diameter of the string in Diagram 14(b)4. When the diameter of the string increases , the frequency of the wave decreases5.The higher the frequency , the higher is the pitch// As the frequency of the sound decreases, the pitch of the sound also decreasesQuestion 15 [Electricity]1. Diagram 15.1 connected in series and Diagram 15.2 connected in parallel2.The reading of ammeter in Diagram 15.2 is greater than in Diagram 15.13.The reading of voltmeter is the same4.The effective resistance in Diagram 15.2 is smaller than in Diagram 15.15.When the effective resistance increases, the current flow decreases.6.When the circuit is in parallel connection, the effective resistance is smallerQuestion 16 [Electromagnetism]1. The N-pole in Diagram 16(a) moved into the solenoid, the N-pole of the magnet in Diagram 16 (b) moved away from the solenoid.2. The galvanometer pointer in Diagram 16(a) deflects to the right, the galvanometer pointer in Diagram 16(b) deflects to the left.3. When N-pole is moved into the coil, the top of the coil is a N-pole, and tends to repel themagnet4. When the N-pole is moved away from the coil, the top of the coil is a S-pole, and thus attracting the receding N-pole.5. Lenzs Law which states that the direction of the induced electromotive force acts in such a way as to oppose the action which produces itSULIT28
  29. 29. Question 17 [Electronic]1The bulb in Diagram 17.2 does not light up while the bulb in Diagram 17.1 lights up2. In diagram 17.2 the negative terminal of the cell is connected to the anode.3. When the anode of the diode is connected to the positive terminal of a cell, the bulb lights up4. When the diode is in forward bias connection, the current flow5. Diode allows current to flow in one direction onlyQuestion 18 [Radioactivity](ii).Difference: Nuclear fission involves the fission of heavy nucleus. Nuclear fusion involves the combination of light nuclei Similarities: Decrease/loss of mass after the process occurs. Neutrons are produced. E = mc2 // loss of mass/ mass defect directly proportional to the energy released .Question 19 [Radioactivity]1. Exponential graph2. The time taken for the activity to become half of its initial value is constant3. The time taken for the activity of P to be half of its initial value is constant //5 hrs4. The time taken for the activity of Q to be half of its initial value is constant //100 s5. Half-lifeVI PROBLEM SOLVING [QUALITATIVE] (Paper 2 Section A: Question 7; Section BQuestion 9/10 )QUESTION 1 Suggestion Reason Thermometer is made from transparentIt is not easily broken glass that is strong The capillary tube is made narrow andIt is more sensitive thin The shape of the thermometer isIt has a magnifying effect round/streamlineIt can measure very low temperature/ not freeze at low The liquid has low freezing pointtemperature Thin glass bulbs wall Absorb / transfer heat fasterSULIT 29
  30. 30. QUESTION 2SuggestionReasonAerodynamic shape / stream line/Reduce air resistancetorpedoLow density material // Lighter //Strong material// high boiling pointDoes not break easily// does not melt easilyBoosting combustion // supply oxygen for combustionHas liquid oxygenRetro rocket /Has several stages that To decrease masscan slip/strip offIncrease the size of combustionMore space for the fuel to be burntchamberQUESTION 3SuggestionReasonStrong material Do not break easilyLow density Small mass / lighter //o increase the accelerationStreamline javelinTo reduce air resistanceThe athlete runs with high speed /has toTo increase kinetic energy/energy/force/ momentumincrease his speed/accelerationThrow at an angle of 45o / Throw withTo get maximum horizontal distance of throwinga great forceQUESTION 4SuggestionExplanationShape of the shuttle conical shape /ovalAllow for better / fast air flow//produce more lift force ///diagram / aerodynamicreduce air resistanceMaterial used for shuttle feather / small Light// high velocity/ acceleration //further distancemass/ low density travelled//reduce inertia // smaller massMaterial used for base of the shuttle Light// high velocity/ acceleration //further distancecork/ small mass/ low density travelled//reduce inertia // smaller massMaterial used for the string of the racquet Not easily broken //withstand high forcestrong/ low elasticityHigh tensionShort time impact// high impulsive forceSULIT30
  31. 31. QUESTION 5 SuggestionReason To create sufficient buoyant force due to greaterBalloon should be large size1weight of surrounding air displaced.Balloon material is made of light weight The total weight of the balloon is less than the2material like nylonbuoyant force//reduce weightBalloon material should also have a high3It will not disintegrate when exposed to hot airmelting point.The part of the balloon (the skirt) near the4 burner must be fire resistant /coated with fireSo that it doesnt catch fire easilyresistant material5 The burner burns (liquefied) propane/gas Warms up the air in the balloon6 A large fan is needed initiallyTo blow enough air into the balloonThe basket must be made off light andProlong the collision time between basket and7 flexible/safe material (e.g. rattan or caneground// reduce impulsive force when basket hitswoven) the groundBest times to launch the balloon are early9 morning and late afternoon when the air is Cool air is denser, providing more buoyant forccoolerQUESTION 6 SuggestionReasonSpecific heat capacity of the wok is low Heat up faster / temperature increase fasterThermal conductivity of the wok is highCan conduct heat fasterMelting point of wok is high Can withstand high temperatureSpecific heat capacity of the oil is low Heat up faster Will not change to vapour easily // cooking at higherBoiling point of oil is high temperatureSULIT 31
  32. 32. QUESTION 7SuggestionReasonPut ice in the cointainer Ice absorbs heat out from the packet drinks.Add a little water to the ice Heat transfer is faster through the heat conduction.Container has high specific heat capacity Heat up slower.White container Does not absorb heatInsulator // low densityAvoid absorb heat from outside into the container // lighterQUESTION 8ModificationReasonSunlight ray will converge / focus to the tank // absorb moreConcave mirrorheatReflect more light /focus light at shorter distance// reduceRadius of curvature is smallerenergy lostBlack Absorb more heatLow specific heat capacityThe temperature rise up fasterBigger size Receive/collect more lightQUESTION 9SuggestionReasonConvex mirror The image formed is virtual, upright an diminishedLarge diameterWider field viewstrongWithstand change in weather / does not break easilyLess thicknessAvoid multiple image formed / clearer imageAt the sharp corner Can reflect the light from opposite directionSULIT32
  33. 33. QUESTION 10SuggestionReasonLonger wavelength/ diffraction easierFrequency of signal is lowno blocking / capture more signalThe location of transmitter higherthe number of transmitter is more / increase the strength of signal/ increase energy of signal /manyreduce energy lost during transmissionhave more energy / can move furtherThe strength of signal is higherThe distance between two transmitterincrease the strength of signal/ increase energy of signalis closerQUESTION 11Suggestion ReasonAttach switch for each lamp To allows each lamp to be switched on and off independentlyConnect the metal fitting lamp to theTo flows electron (extra) to earth to avoid lethal shockearth wire/cableVoltage across both bulbs is 240 V / if one bulb blows anotherParallelbulb can still function.Using only 240 V light bulb To ensure the bulbs light up with normal brightnessStep down transformer / adapter Reduce the voltage from 240 V to 12 V.QUESTION 12SuggestionReasonSoft spring Give a greater sensitivity/ can detect small changesSmall density Small mass / lightRadial magnetic field, create uniform strength of magneticCurve in shape of the magnetfield around the coilcopper coil To reduce energy loss / Low resistance material of the coilPlace the seismometer in directto convert very small motions of the earth into electrical signalscontact with the earthSULIT33
  34. 34. QUESTION 13 Suggestion ReasonOR gateThe gates output is ON if either one sensor is ONThermistor Resistance decrease when temperature increase Base voltage increase, when the temperature increase.At R1 and R2 Base current flows, collector current flows. Alarm will triggered. It converts the electrical signal into sound energy/ AlarmReplace the lamp or at the collector circuit triggered when collector current flow.Relay switch To switch on the alarm which is use a greater voltageQUESTION 14ComponentFunctionFilament To heat up the cathodeCathodeEmits electrons Controls the number of electrons//Control Grid control the brightness of the image on the screenFocusing anode Focuses the electrons into a beamAccelerating anode To accelerate electrons to towards the screenY-plates To deflect the electron beam vertically To deflect the electron beamX-platesHorizontallyQUESTION 15Suggestion ReasonUse forcep/robot The distance between the source and the body is farWear a mask/goggle The radiation does not penetrate our eyesUse a lead box/container with thick To prevent radiation leakage to surroundingsconcreteKeep the exposure time as short as The body is not exposed to the radiation for a long timepossibleWear a film bandageTo detect the amount of radiation exposedPut radiation symbol on the storage boxTo inform the users of dangerous contents of the boxWear coat lined with leadTo protect the body from the radiationSULIT 34
  35. 35. SECTION VII PROBLEM SOLVING [QUANTITATIVE] (Paper 2 Section C Question 11/12 )1.(i) impulse = mv mu= 1.5 ( -35-40) = 112.5 kg ms-1(ii) Impulsive force = mv-mu t= 140.625 N2.(i) 900 N(ii) F 900 N = 1000 (2)F = 2 900 N3.(i) v = 18 x1000 = 5 ms-160 x 60a =v ut=5 0 10= 0.5 ms-2(ii) F = ma = ( 202) (0.5) = 101 N4.(i)Spring constant P , k =F = 6N x12 cm = 0.5 Ncm-1 Spring constant Q, k = F = 3N x 12 cm = 0.75 N cm-15.(i)Buoyant force = weight of the boatV g = 250 (10)V = 0.25 m-3(ii) Weight of the boat + weight of the load = buoyant force 2500 + WL = 1000 (4) (10)SULIT35
  36. 36. WL= 40 000 2500= 3 7500 N Mass of load = 3 750 kg6. (i) F = 500 x 40= 20 000 N (ii) Resultant force = 20 000 800 (10) = 12000 N (iii)F = ma a = 12 000 800=15 ms-27. (i) F1 = F2 A1 A2 F2 = 6N ( 1.2)0.2= 36 N(ii) V1 = V2 A1h1 = A2h2h2 = 1.2 (0.2) 1.2= 0.2 cm8.(i) F = Vg= 1020 (2)(10)= 20 400 N(ii) Buoyant Force = weight of the boat + weight of the box20 400 N = 15 000 + WW = 5 400N9.(i)Mass,m =V= 800 x 0.004 = 3.2 kg(ii) Pt = mc 2 500 (t) = 3.2 (2 000) (130)t = 332.8 sSULIT36
  37. 37. 10. (i) 1/f = 1/u+1/v1/-15 = 1/20 + 1/v v = - 8.6 cm(ii) Magnification = v/u = 8.6 / 20 = 0.43(iii) virtual, upright and diminished11. (i)1/f = 1/v + 1/u1/5 = +1/v 2v = -3.33 cm 2(ii) m = v/u=3.33/2= 1.67 timessin 1(i) =12. sin 1 sin 11.5 =sin 30 1sin = 0.75 1 = 48.6o1(ii)=sin 11.5 =sin = 41.8 oCsin (iii)1.5= sin 40 sin b = 0.9642 b = 74.6o = 15.4o 213. (i)4 cm1(ii) 5 Hz2(iii)20 cm s-114. (i) Np= VpSULIT37
  38. 38. Ns Vs= 24012 = 20Ratio = 20 : 1(ii) P = IV I = 60 /12 =5A(iii)80 = Po x 100Pi80 = 60x 100Ip (240)Ip = 0.3125A 15. eV = me v21.6 x 10-19 (3 x 103) = (9.0 x 10-31) v2v = 3.27 x 107 m s-1(i) 16.(i) 1 1/8(ii)(iii) 3T = 3 X 8 days= 24 days(ii)32 days = 32/8= 4 T20 mg10 mg5 mg2.5 mg 1.25 mgor()4 X 20 = 5/4= 1.25 mg SECTION VIII A Paper 3 Section A Question 1 a (i) Angle of incidence / i (ii)Angle of refraction / r // sin r (iii) Refractive index of the glass block (b) & (c)i sin ir sin r 15o 0.258811o0.1908 SULIT 38
  39. 39. 30o 0.5000 20o 0.3420 45o 0.7071 29o 0.4848 60o 0.8660 36o 0.5878 75o 0.9659 41o 0.6561(d) Draw graph sinr against sin i corecltly(e)sin i is directly proportional to sin rQuestion 2 QUESTION ANSWERMARKa) (i)d increases as t increase 11 Draw a dotted line at t = 0.4 s(show on the graph)a) (ii) d = 0.46 m1 (answer + unit) Draw a tangent line at t = 0.5s Draw a big triangle (shown on the graph)15PQ1.64 - 01b) (i)Gradient, m ==QR0.7 0.311 (shows theworking) -1 =4.2051 ms12m(2)( 4.2051) 1(substitution)b) (ii)a== T0.5(correct answer+ unit; 2 to 4 1 d.p.)c) (i)Velocity 1 (answer + unit) -2 =16.8204 msc) (ii) Velocity increases as time increase1SULIT 39
  40. 40. QUESTIONANSWER MARK Avoid parallax error by making sure the eye is perpendicular to the scale ofd) 1 metre rule when measuring displacementTOTAL12SULIT40
  41. 41. SECTION VIII B EXPERIMENT (Paper 3 Section B)Question1 [Force and Motion] NoAnswerInferenceThe force affects the acceleration (a) (b)Hypothesis The greater the force, the greater the acceleration (c)i. Aim To investigate the relationship between the force and the accelerationii. Variables Manipulated variable: Force. F (weight of the load) Responding variable : acceleration, a Fixed variable : Mass of the trolley, miii. List of apparatus and materials A trolley, runway, ticker- timer, ticker-tape, power supply,metre rule and wooden block States the workable arrangement of the apparatusa.c power supply Set up Set up the apparatus as shown in the diagram. States the method of controlling the manipulated variable Use load of F = 0.5 N to pull the trolley down the runway. States the method of measuring the responding variable Switch on the power supply and release the trolley. Cut the ticker tape into 5-tick strips and a tape chart for the motion of the trolley is made. v u Calculate the acceleration of the using a and record the data. tSULIT41
  42. 42. NoAnswerRepeat the experiment at least 4 timesRepeat the experiment by using F = 1.0 N, 1.5 N, 2.0 N, 2.5, N and 3.0 N.Tabulating of data Force, F/ N acceleration , a /cms-2 0.5 1.0 1.5 2.0 2.5 3.0State how data will be analysedPlot graph of acceleration against Force a/cms-2F/NSULIT42
  43. 43. QUESTION 2 (FORCE AND MOTION) No Answer(a) InferenceThe mass affects the acceleration(b) hypothesis The greater the mass, the smaller the acceleration(c) i. Aim To investigate the relationship between the mass and the acceleration ii. Variables Manipulated variable : mass. m Responding variable: acceleration, a Fixed variable: Mass of the trolley, m A trolley, runway, ticker- timer, ticker-tape, power supply,metre rule and wooden blockiii. List of apparatus and materials States the workable arrangement of the apparatusa.c power supplySet up the apparatus as shown in the diagram. Use load of F = 0.5 N to pull the trolley down the runway. States the method of controlling the manipulated variable Use trolley with the mass, m = 500 g States the method of measuring the responding variable Switch on the power supply and release the trolley. Cut the ticker tape into 5-tick strips and a tape chart for the motion of the trolley is made.v u Calculate the acceleration of the using aand record the data.t Repeat the experiment at least 4 timesSULIT 43
  44. 44. NoAnswer Repeat the experiment by using m = 1000 g, 1500 g, 2000 g and 2500 g Tabulating of dataMass, m/ g acceleration , a /cms-2500 1000 1500 2000 2500 3000 State how data will be analysed Plot graph of acceleration against Massa/cms-2m/gQuestion3 [Force and Motion] No Answer (a)InferenceThe speed affects the position of the driver when the car stops suddenly (b)Hypothesis The greater the speed, the longer the distance to stop (c)i. Aim To investigate the relationship between the speed and the distanceii. VariablesManipulated variable: the height , h (the more the height, the greater the speed) Responding variable: the distance, s Constant variable: the mass, miii. List of apparatus runway, load, trolley, ticker timer and ticker tape, power supply, metre rule. and materialsSULIT 44
  45. 45. NoAnswer Labeled diagram:Inclined planes h Measure the height, h =10.0 cm of the inclined plane from the surface. Let the trolley moves down the inclined plane.h Calculate the speed of the trolley, v from the ticker tape obtained.s Measure the forward distance of the load, s Repeat the experiment with h = 15.0 cm, 20.0 cm, 25.0 cm, 30.0 cm and 35.0 cm. height, h / Forward distance, s speed, v (cms-1) cm(cm)10.015.020.025.030.035.0 The graph(axis) of s against v or h is drawn TOTALQuestion 4 [Force and Motion] NoAnswer(a) InferenceThe compression of the spring affects the vertical distance of the projectile(b) hypothesis The greater the compression of the spring, the greater the vertical distance of the projectile(c) i. Aim To investigate the relationship between the compression of the spring and theii. Variablesvertical distance of the projectile Manipulated variable : compression of the spring. x Responding variable: vertical distance of the projectile, a Fixed variable: Mass of the ping pong ball, miii. List of apparatus and materials A spring, ping pong ball,metre ruleSULIT 45
  46. 46. NoAnswerStates the workable arrangement of the apparatusSet up the apparatus as shown in the diagram.States the method of controlling the manipulated variableCompress the spring, x = 1.0 cm with the ping pong ballStates the method of measuring the responding variableRelease the ping pong ballMeasure the maximum distance of the ping pong ball, h using metre rule.Repeat the experiment at least 4 timesRepeat the experiment by using x = 1.5 cm, 2.0 cm, 2.5, cm and 3.0 cm.Tabulating of data Compression of vertical distance of the projectile , the spring, x/ cmh /cm 1.0 1.5 2.0 2.5 3.0State how data will be analysedSULIT46
  47. 47. NoAnswerPlot graph of h against xh/cm x/cmQuestion 5 [Force and Pressure] No Answer(a) Inference State a suitable inferenceThe pressure exerted on the surface depends on the area of contact.HypothesisState a relevant hypothesis(b) When the area decrease, the pressure increases(i) Aim State the aim of experimentTo investigate the relationship between the area of contact andpressure (depth of hole).(ii) VariablesState the suitable manipulated variables and responding variable (Quantitythat can be measured)(c) ( Manipulated variable : Area of contact object.i Responding variable : pressure exerted (depth of hole))State the constant variableForce applied (using 1 kg load)(iii) List of State the complete list of apparatus and materialsApparatus andMaterials Vernier caliper, soft plasticine, ruler, Load 1 kg, the object with different surfacearea but same weight.Draw the functional arrangement of the apparatusSULIT47