cnth skema fizik paper 3

8/6/2019 Cnth Skema Fizik Paper 3

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PEPERIKSAAN PERTENGAHAN TAHUN 2010

PHYSIC TINGKATAN 4

PAPER 1

ANSWER

1. D 11 A 21 B 31 C 41 A

2. D 12 B 22 C 32 A 42 C

3. A 13 C 23 C 33 A 43 A

4. B 14 A 24 C 34 D 44 D

5. E 15 D 25 B 35 C 45 C

6. B 16 B 26 D 36 B 46 B

7. C 17 C 27 B 37 C 47 D

8. A 18 A 28 B 38 A 48 D

9. B 19 A 29 B 39 A 49 D

10. D 20 A 30 C 40 C 50 B

Skema Pemarkahan Fizik Kertas 3 Tingkatan 4

Peperiksaan Pertengahan Tahun 2010

1

SECTION A

MARK NO MARKING CRITERIA

SUB TOTAL

1(a) (i) State the manipulated variable correctly

- Length (of pendulum)/ l 1 1

(ii) State the responding variable correctly- Period of oscillation / T / Time taken for 10

oscillations / t

1 1

(iii) State the constant variable correctly- Mass // weight (of the pendulum bob) 1 1

(b) (i) *Record the readings, t of stopwatch correctly

All 5 values of t are correct 2 2

3 or 4 values of t are correct 1

(* Tanda pada jadual)(ii) *Record the readings of T correctly

All five readings of T correct and consistent to two

decimal places.

1 1

Accept e.c.f

(*Tanda pada jadual)

(iii) *Calculate the values of T2 correctlyAll five reading of T

2 are correct and consistent to

one/two/three decimal places.

Accept e.c.f

2 2

3 or 4 readings of T2are correct.

(* Tanda pada jadual)

1

(c) Tabulate the results for l, t, T and T2 correctly

l/cm t / s T / s T 2 / s

2

30.0 42.4 4.24 17.98

40.0 50.0 5.00 25.00

50.0 56.2 5.62 31.58

60.0 61.6 6.16 37.95

70.0 66.4 6.64 44.09

Give a tick (ü) based on the following:

— Columns l, t, T and T2

— Correct units for l, t, T and T2

ü

ü

2





2

Sample marking:

l/cm t / s T / s T 2 / s

2

30.0 42.4 4.24 17.98

40.0 50.0 5.00 25.00

50.0 56.2 5.62 31.58

60.0 61.6 6.16 37.95

70.0 66.4 6.64 44.09

(d) Draw a complete graph of T2 against l

Give a tick (ü) based on the following:

A — T2 at the y-axis, l at the x-axis

B — Correct units at both axes

C — Uniform scale at both axes

D — 5 points plotted correctly

[Note : 3 or 4 points plotted correctly : ü]

E — Line of best fit is drawn

F — Minimum size of graph 5 x 4 big squares

(Big square : 2 cm x 2 cm)

(From the origin to the last point)

Marks awarded :

Number of ü Marks

7 ü 5

5-6 ü 4

3-4 ü 3

2 ü 2

1 ü 1

ü

ü

ü

üü

ü

ü

5 5

(e) State the correct relationship between Δθ and t

T 2 is directly proportional to l

(If the graph through the origin)

OR

T 2 is increases linearly to l

(If the graph through a y-intercept or x-intercept)

1

If:

( No relationship is accepted between T 2

and l)

TOTAL 16

c

b( i) b ( i i) b ( i ii )

7 / 7



3

2

(a)(i)

(ii)

h is directly proportional to t 2

When h = 44.0 cm

t 2

= 0.0088 s2

- 1 mark

Show on the graph with a horizontal line or

with a vertical line at h = 44.0 cm – 1 mark

Answer : t = 0.3 s @ 0.297 s @ 0.2966 s – 1 mark

1

1

1

1

(b) (i) Shows on the graph appropriate big right triangle. ( 4 × 4 big squares)

Gradient , m =012.0

060

−

−

= 500.0 cm s-2

(with unit)

1

1

1

(c) (i)

(ii)

0 / 0 cm s-1 / 0 ms

-1

h = (0)t +2

1g

t 2

=2

1g

t

2(substitute u = 0 cm s

-1)

g =2

2

t

h= 2 × gradient

= 2 × 500 (substitute the value of gradient into the formula) = 1000 cm s-2

@ 10 m s-2

(with unit)

1

1

11

(d) 1. Avoid parallax error by placing the eye perpendicular to the scale of the

stopwatch.

2. Repeat experiment 4 times and calculate the average

1

TOTAL 12





4

SECTION B

Question 3 Marks Answer Note

(a) 1 Making the right inferenceVelocity depend on the height of the track(hillock).

Accept-

speed/acceleration

(b) 1 Building an appropriate hypothesis

The greater the height, the larger the velovity.

(c)(i) 1 Stating the aim of the experimentTo study the relationship between the height and

velocity

(ii) 1

1

Stating the correct variablesManipulated variable : height (of track), h // number

of similar wooden blocks

Responding variable : velocity, v

Fixed variable : length (of track), l //

Mass (of trolley) , m//Weight

Accept-

speed/acceleration

(iii) 1 List of appropriate apparatus and material

Metre-rule, a.c. power supply, ticker tape, ticker

timer, trolley, and track

(iv) 1 Describing set up of the apparatus

v)

1

1

1

Stating the procedure of the experiment

1. Set the track so that the height of track, h = 15.0 cm.

2. Switch on the power supply and allow the trolley to come down the

track. Calculate the velocity, v (of the trolley) from the ticker-tape .

3. Repeat steps 2 and 3 for h = 20.0 cm, 25.0 cm, 30.0 cm and 35.0 cm.

vi) 1 Tabulating data

Height (cm) Velocity (cms-1

)

20

30

40

5060

** Unit is notrequired.

viii) 1 Analysing data

v

h

**This mark may be

given at the last line

for procedure.

Total 12

a.c. powersupply

Ticker tape

Ticker timer

Trolley

track

h



5

4 (a) Inference:The inertia depends on the mass

1

(b) Hypothesis : As the mass increases as the inertia increases/

Causes Effects

-Mass - inertia

- Period of oscillation

- Time taken for 10 oscillations

*Reject : weight

*Reject : Difficulty of pushing/moving

1

(c)(i)

(ii)

(iii)

(iv)

(v)

(vii)

(viii)

Aim:To investigate the relationship between the mass and the inertia

List of variables:

Manipulated variable: the mass

Responding variable: the inertia/ period of oscillations/ time taken for 10

oscillations

Fixed variable: Number of oscillation/ the length of the hacksaw blade.

List of apparatus :Hackaw blade, plasticine, G-clamp, stopwatch

, and

balance.

Arrangement of apparatus:

The procedure of experiment:

- The mass of the plasticine is measured by a balance,m = 30.0g

- The jigsaw blade is displaced horizontally to one side and then released so

that it oscillates. The time taken for 10 oscillations , t is recorded by a

stopwatch./ The period of oscillation is recorded.

- The experiment is repeated 4 times by using plasticine balls with mass =

40.0 g, 50.0 g, 60.0 g and 70.0 g.

Tabulation of data:

Mass/g 30 40 50 60 70 80

Period/T

Analysing data :

Plot the graph of period, T against mass, m //

1

1

1

1

1

1

1

1

1

1

12

Hacksaw blade

cnth skema fizik paper 3

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