SEKOLAH MENENGAH KEBANGSAAN

PAGE 11

SEKOLAH MENENGAH KEBANGSAAN

BANDAR BARU SALAK TINGGI

UJIAN BULANAN 2 - 2008

TINGKATAN 4

FIZIK

Nama :.................................... Tingkatan :........................

Section A [ 20 marks]

1. Four arrangements A, B, C and D are made of identical springs. Each spring extends by 4 cm when a 200 g load is hung at its end. Which arrangement produces the largest

extension?

Empat susunan A, B, C dan D adalah terdiri daripada spring yang sama. Setiap spring meregang sebanyak 4 cm apabila satu beban 200 g digantung pada hujungnya. Susunan yang manakah menghasilkan regangan yang terbesar?

2. The diagram shows the side view of a swimming pool.Rajah menunjukkan pemandangan sisi kolam renang.

The correct comparison of the pressure exerted on X, Y and Z isPerbandingan yang benar bagi tekanan yang terhasil pada X, Y dan Z ialahA PX = PY = PZ

B PX = PY < PZ

C PX = PY > PZ

D PX > PY = PZ

3. The diagrams show the position of a steel ball bearing when the spring is compressed

and after the spring is released.Rajah menunjukkan kedudukan bola besi apabila spring dimampatkan dan dilepaskan.

The distance x can be increased by usingJarak x meningkat dengan menggunakan

A a softer spring

B a longer spring

C a spring with a larger diameter

D two similar springs arranged in parallel

4. FIGURE shows a bottle full of water being placed in a water trough .

What causes the water to remain in the bottle?

A. Water pressure.

B. Atmospheric pressure.

C. Capillary action.

D. Surface tension.

5. A container with dimension 3 m x 1 m x 0.5m is filled with oil which weight 12000 N. Sebuah bekas dengan dimensi 3 m x 1 m x 0.5m diisi dengan minyak yang mempunyai berat 12000 N.What is the minimum pressure exerted by the container due to the oil? Berapakah tekanan minimum yang dikenakan oleh bekas dan minyak itu?A3 000 Pa

B4 000 Pa

C6 000 Pa

D8 000 Pa

6. The diagram shows a water reservoir .Rajah menunjukkan sebuah empangan.

Hillslope water wall of dam

Lereng bukit Air dinding

empangan

The base of the wall is thicker because

Bahagian bawah dinding lebih tebal kerana

A it will be more stable.

dinding akan lebih stabil

B the density of water is high

ketumpatan air tinggi C Pressure of the water is highest at the surface

Tekanan paling tinggi di bahagian permukaan air

D Pressure of the water is highest at the base

Tekanan paling tinggi di bahagian bawah

7. The diagram shows a hyraulic pump.

Rajah menunjukkan sebuah pam hidraulik. Which comparison is true?

Perbandingan yang manakah benar?

A F1 = F2 B F1 > F2 C Pressure on piston 1 = pressure on piston 2

Tekanan di omboh 1 = tekanan di omboh 2

D Pressure on piston 1 < pressure on piston 2

Tekanan di omboh 1 < tekanan di omboh 2

8. The presence of air bubbles in the hydraulic brake system causes the system to function inefficiently. Which statement explains this observation ?

Kehadiran gelembung-gelembung udara di dalam sistem brek hidraulik akan menyebabkan sistem tidak cekap. Pernyataan manakah menerangkan pemerhatian ini ?

A The air bubbles reduce the viscosity of the brake fluid

Gelembung-gelembung udara mengurangkan kelikatan cecair brekB The air bubbles escape when the brake pedal is pressed

Gelembung-gelembung udara terbebas keluar apabila brek ditekanC The air bubbles expand when the brake system becomes hot due to friction

Gelembung-gelembung udara mengembang apabila sistem brek menjadi panas disebabkan oleh geseranD The air bubbles are compressed when the brake is pressed.

Gelembung-gelembung udara dimampatkan apabila brek ditekan

9. The diagram shows a simple mercury barometer. Rajah menunjukkan suatu barometer ringkas.

Which of the following does not cause the height of the mercury column to vary?

Antara yang berikut yang manakah tidak akan mengubah ketinggian turus merkuri?

A.Changes in atmospheric pressure.

BChanges in the temperature of mercury.

CChanges in the value of gravitational acceleration, g.

DEvaporation of mercury from the barometer reservoir

10. The diagram below shows a siphon in operation. Rajah menunjukkan suatu sifon yang sedang beroperasi.

Which of the following statement is true? Antara pernyataan berikut yang manakah benar?AWater flows from the conical flask until the flask is empty. Air mengalir dari kelalang kon sehingga kelalang itu kosong.BWater flows from the beaker to the conical flasks until the flask is full. Air mengalir dari bikar ke kelalang kon sehingga kelalang itu penuh.CWater flows from the beaker to the conical flask until the water levels in both containers are equal. Air mengalir dari bikar ke kelalang kon sehingga paras air kedua-dua bekas adalah samaDWater flows from the beaker to the conical flask until the volume of water in both containers are equal.

Air mengalir dari bikar ke kelalang kon sehingga isipadu air dalam kedua-dua bekas adalah sama.

11. The diagram below shows a hydraulic jack used to raise a block of 6 kg.

Rajah di bawah menunjukkan jek hidaulik digunakan untuk menaikkan 6 kg bongkah.

The cross-sectional areas of smaller piston and larger piston are 0.05 m2 and 2.0 m2respectively. What is the force, F, acting on the smaller piston?Luas keratan rentas bagi piston kecil dan piston besar ialah 0.05 m2 dan 2.0 m2 . Berapakah daya, F , yang bertindak pada piston kecil.

A. 0.15 N D. 150.00 N .

B. 1.50 N E. 1 500.00 N

C. 15.00 N

12. The diagram shows the position of a hydrometer in four different liquids P, Q, R and S. Which liquid has the lowest density ?

Gambar rajah menunjukkan kedudukan hidrometer di dalam empat jenis cecair yang berbeza P, Q, R dan S. Cecair manakah yang mempunyai ketumpatan paling rendah ?

13. The diagram shows a block of wood with a mass of 300 g is partially immersed in a liquid. Rajah menunjukkan suatu bongkah kayu yang berjisim 300 g terendam separa dalam sejenis cecairCalculate the buoyant force acting on the block of wood? Hitungkan daya tujah ke atas yang bertindak terhadap bongkah kayu itu.

A3.0 N

B2.5 N

C1.8 N

D1.5 N

14. Diagram shows a cylinder containing water.

Rajah menunjukkan satu silinder yang mengandugi air.

If the pressure at point P is 12 000 N m-2, the height of h is [the density of the water = 1000 kg m-3]

Jika tekanan pada titik P ialah 12 000 N m-2 , tinggi h ialah

[ketumpatan air = 1000 kg m-3 ]

A 0.8 m

B 1.0 m

C 1.2 m

D 2.0 m

E 2.2 m

15. Diagram 1 and Diagram 2 shows a mercury barometer and mercury manometer respectively. The manometer is connected to a gas supply.

Rajah 1 dan Rajah 2 masing-masing menunjukkan sebuah barometer merkuri dan manometer merkuri. Manometer itu disambung ke suatu bekalan gas.

Diagram 1 Diagram 2 What is the pressure of the gas from the gas supply?

Berapakah tekanan gas daripada bekalan gas itu?

A29 cm Hg D75 cm Hg

B46 cm Hg E 104 cm Hg

C52 cm Hg

16. Diagram shows a hydraulic device. The force, F, is able to support a load of weight, W.

Rajah menunjukkan satu alat hidraulik. Daya, F, dapat menyokong beban yang mempunyai berat, W.

What is the relationship between W, F, A and a?

Apakah hubungan antara W, F, A dan a?

AWA = Fa

B

C

DW + A = F + a

17. Diagram 1 and Diagram 2 shows an object being weighed in air and in water respectively.

Rajah 11.1 dan Rajah 11.2 masing-masing menunjukkan satu objek ditimbang di udara dan di dalam air.

DIAGRAM 1 DIAGRAM 2 What is the buoyant force on the object?

Berapakan daya tujah ke atas pada objek itu?

A1.2 N

B3.6 N

C4.8 N

D6.0 N

E7.2 N

18. Which of the following is an application of high pressure?

Manakah antara berikut merupakan aplikasi untuk keadaan tekanan yang tinggi?

A

Military tanks having special wheels called caterpillar tracks.

Kereta kebal mempunyai tayar khas yang dinamakan caterpillar track.

B

Hammering a nail with a sharp end into a wall.

Menukul paku yang tajam pada dinding.

C

A skier moves faster over snow on skis.

Peluncur salji bergerak dengan pantas di atas salji menggunakan kasut ski.

D

A tractor has big and broad tyres.

Sebuah traktor mempunyai tayar yang besar dan lebar.

19. The diagram shows water spurting out from a hole of a container at a distance of a.Gambar rajah menunjukkan air terpancut keluar dari lubang sebuah bekas pada jarak a.

When the level of the water decreases, what will happen to the distance, a ?

Apabila paras air berkurangan, apakah yang berlaku pada jarak a?

A

Increases

Bertambah

B

Decreases

Berkurang

C

Remains constant

Tidak berubah

20. The diagram shows a submarine which is partially submerged in water.

Gambar rajah menunjukkan sebuah kapal selam yang terendam sebahagiannya di dalam air.

Which relationship between the physical quantities in the above situation is correct?

Manakah antara hubungan kuantiti fizik yang menerangkan situasi di atas betul?

A

Weight of water displaced < weight of the submarine + weight of water in the ballast tank.

Berat air tersesar < berat kapal selam + berat air dalam tangki balast.

B

Weight of water displaced = weight of the submarine + weight of water in the ballast tank.

Berat air tersesar = berat kapal selam + berat air dalam tangki balast.

C

Weight of water displaced > Weight of the submarine + Weight of water in the ballast tank.

Berat air tersesar > Berat kapal selam + Berat air dalam tangki balast.

ANSWER SECTION A

1

6

11

16

2

7

12

17

3

8

13

18

4

9

14

19

5

10

15

29

Section B [ 20 marks ]

1.Diagram 1.1 and Diagram 1.2 show two dams with different shapes.Rajah 1.1 dan Rajah 1.2 menunjukkan dua empangan yang berlainan bentuk.

DIAGRAM 1. 1

DIAGRAM 1.2

(a) Based on Diagram 1.1 and Diagram 1.2Berdasarkan Rajah 1 dan 2(i) Compare the dams in Diagram 1.1 and Diagram 1.2. Bandingkan empangan dalam Rajah 1.1 dan Rajah 1.2.

.....................................................................................................................

.....................................................................................................................

[1 mark](ii) Compare the pressure at point A and point B in the lake.

Bandingkan tekanan di titik A dan B dalam tasik itu......................................................................................................................

[1 mark](b) (i)Based on the answer in (a)(ii), which dam is stronger? Berdasarkan jawapan dalam (a)(ii), yang manakah lebih kuat?

.....................................................................................................................

[1 mark]

(ii) Explain the reasons for your answer in (b)(i). Jelaskan sebab bagi jawapan anda dalam (b)(i)

.....................................................................................................................

.....................................................................................................................

.....................................................................................................................

[ 2 marks ]

2.

Figure 2.1 shows the set-up for an experiment to determine the density of the solid P. Figure 2.2 shows the reading of the balance and the water level when the P is immersed in water.Rajah 2.1 menunjukkan ekperimen yang disediakan untuk menentukan ketumpatan pepejal P. Rajah 2.2 menunjukkan bacaan neraca spring dan aras air apabila P direndamkan di dalam air.

Figure 2.1 Figure 2.2

(a) (i) What is meant by the density ?

Apakah yang dimaksudkan dengan ketumpatan?

[1 mark]

(ii) What is the volume of the solid P ?

Apakah isipadu pepejal P ?

[1 mark]

(iii) Calculate the density of the solid P.

Hitung ketumpatan pepejal P. [2 marks]

The solid material P is converted into small solid spheres that can be used to create a simple hydrometer as shown in Figures 2.3 and 2.4.Bahan pepejal P di ubah menjadi pepejal sfera kecil yang boleh digunakan untuk membina hidrometer seperti yang ditunjukkan dalam Rajah 2.3 dan 2.4.

Figure 2.3 Figure 2.4

(b) (i) Compare the densities of liquid X and liquid Y. Bandingkan ketumpatan bagi cecair X dan cecair Y.

[1 mark]

(ii) Compare the upthrust experienced by the simple hydrometer in Figures 2.3 and 2.4.

Bandingkan daya tujah keatas bagi hidrometer ringkah dalam Rajah 2.3 dan 2.4.

[1 mark]

(c) A submarine can sail on the sea surface and under the sea.

Explain how a submarine on the surfaces submerges.

.

.

.

[ 3 marks ]

3Diagram 3.1 shows a helix spring, S. The spring will compressed when a Force, F exerts on it.Rajah menunjukkan spring helix. Spring termampat apabila daya dikenakan.Diagram 3.2 shows the relationship between the force, F and the extension of the spring, x.Rajah 2 menunjukkan hubungan antara daya,F dan pemanjangan spring,x.

Diagram 3.1 Diagram 3.2(a) A law states that;The extension of a spring is directly proportional to the force applied if the elastic limit of the spring is not exceeded.Name this law.Namakan hukum ini.

[ 1 mark ]

(b) Name the physical quantity that can be determined from the gradient of the graph?Namakan kuantiti fizik yang yang mewakili dari kecerunan graf.

............................

[ 1 mark ]

(c) Mark with a cross (x) the elastic limit of the spring on Diagram 3.2. Tandakan dengan pangkah (x) elastic limit bagi spring pada Rajah 2.

[ 1 mark ]

(d) Calculate the energy stored in the spring when it is compress by 0.04 m.Hitungkan tenaga yang tersimpan di dalam spring apabila dimampatkan 0.-04 m.[ 2 marks ]

(e) Another spring, identical to spring S, is added to the arrangement in Diagram 3.3. The experiment is then repeated.Spring lain yang sama dengan spring S ditambah pada susunan dalam Rajah 3. Eksperimen diulangi.

Diagram 3

Sketch the graph of F against x on diagram 3.2. Lakarkan graf bagi daya melawan pemanjangan dalam Rajah 2.

[ 1 mark ]

FORMULA:

1. P = F/A

2. P = hg

3. F = kx

4. Ep = Fx

0.5 m

3.0 m

1.0 m

reservoir

Height of

mercury column

EMBED PBrush

75 cm

29 cm

To gas supply

Ke bekalan gas

W

F

Area, a

Luas, a

Area, A

Luas, A

6.0 N

0 N

1.2 N

4.8 N

Submarine

400 g

A

B

C

D

400 g

400 g

400 g

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