SMK TINGGI KLANG JULY TEST 2013

FORM 4PHYSICS

Name : ___________________________________________ Form : ___________

Date : 18/7/2011 (Thursday) Time : 10.00 – 11.00 am (1 hour)

Objective Questions

Instruction : This question paper consists of 20 objective questions and 5 subjective questions. Answer all objective questions. Mark your answer in last page. Each question is followed by either three or four options. Choose the best option for each question.

1. One joule of work is done when an object of mass 1 kgA is raised vertically by 1 meterB is pulled over a distance of 1 meter by a force of 1 NC is moving with a velocity of 1 m s-2

D is moving against a frictional force of 1 N

2. Joule (J) is the unit forA power onlyB work onlyC work and energyD power, work and energy

3. A student is able to lift an object by 1 m with a force of 200 N in 2 s.the power of the boy is A 40 WB 100 WC 200 WD 400 W

4. In a hydroelectric power station, the order of energy conversion is A kinetic energy chemical energy electrical energyB heat energy mechanical energy electrical energyC kinetic energy heat energy mechanical energyD potential energy kinetic energy electrical energy

5. Choose the diagram which shows the student doing the maximum work.

Nazirah tambah satu atau dua lagi soalan. Jadi kan 3 soalan.

6. Diagram 1 shows a weightlifter successfully lifting a load of 60 kg.

Calculate the work done in lifting the loadA 30 JB 120 JC 600 JD 1200 J

7. Diagram 2 shows a motor lifting a load of mass 8.0 kg. The motor takes 4 s to lift the load to a height of 0.5 m.

8. Diagram 3 shows a student running up a staircase at a constant speed.

Diagram 2

What is the power of the motor?A 4 WB 10 WC 16 WD 40 W

Diagram 3

Which physical quantity increases while the student is running up the staircase ?A Inertia of the studentB Momentum of the studentC Kinetic energy of the studentD Potential energy of the student

9. Diagram 4 shows ball bearing p being released on a smooth plane.

Diagram 4 What is its velocity at Q? A 2.4 m s-1

B 4.0 m s-1

C 7.8 m s-1

D 16.0 m s-1

10. Which of the following sources of energy is not renewable?A PetroleumB Solar energyC Wind energyD Hydroelectric energy

11. Which graph represents Hooke’s Law ?

12. The diagram shows load M supported by the arrangement of springs, P, Q and R. All the springs are identical.

Which comparison is correct about the extension of P, Q and RA P < Q < RB Q < R < PC R < Q < PD Q < P < R

13. A spring with a force constant of 30 N m-1 is stretched by a force of 6 N. What is the elastic potential energy stored in the spring?A 0.2 JB 0.6 JC 1.2 JD 5.0 J

14. Which of the following cannot increase the elastic constant of a spring?A Reducing the length of the springB Increasing the diameter of the springC Using a stronger metal like steelD Using a thicker wire

15. Diagram 5 shows a force acting on a surface.

Diagram 5

The pressure on the surface can be reduced by A decreasing the surface area of contact B increasing the magnitude of the force C applying the force at an angle to the surface

16. Diagram 6 shows a construction worker walking on a wooden board placed above the corrugated roof of a building.

Diagram 6

The purpose of placing the wooden board above the roof is for him to A achieve equilibrium of forces B reduce the force acting on the roof C reduce the pressure exerted on the roof D walk faster and prevent his feet from slipping

17. The diagram shows water spurting out from a hole of a container at a distance of a.

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

A Increases B Decreases C Remains constant

18. Diagram 7 shows a cuboid with the dimensions 4 cm × 5 cm × 10 cm and a density of 2.8 g cm-3.

What is the pressure acting on the base of the cuboid? A 0.28 Pa B 2.8 Pa

19. Diagram 8 shows the design of a dam.

Diagram 8

Why does the thickness of the dam increase with its depth? A The cost of construction is lower B Water pressure increases with depth C The design of this structure is stronger D Water pressure acts uniformly in all directions

20. Diagram 9 shows three points X, Y and Z in three different liquids.

Diagram 9

Which is the correct comparison for the pressure at X, Y and Z? A PY > PX > PZ

B PY < PX < PZ

C PX < PY < PZ

D PX = PY = PZ

Subjective Questions

Diagram 7

C 280 Pa D 2800 Pa

Instruction : Answer all questions in this section. Write your answer in the space provided.

1. Diagram 10 shows a student throwing a small ball.

Diagram 10

(a) If the force which acts on the ball is 25 N and the distance of his hand movement is 0.6 m, calculate the work done by the student.

[3 marks]

(b) State the change of energy that occurs when the student throws the ball.

_____________________________________________________________________________________

_____________________________________________________________________________________

[2 marks]

(c) State the relationship between the energy gained by the small ball and the distance of projection, R.

_____________________________________________________________________________________

_____________________________________________________________________________________

[2 marks](d) State the physics principle involved in 1 (c).

_____________________________________________________________________________________ [2 marks]

(e) What will happen to the period of time the ball is airbone if a heavier ball is used ?

_____________________________________________________________________________________ [2 marks]

(f) Give one reason for your answer in 1 (e).

_____________________________________________________________________________________

_____________________________________________________________________________________

_____________________________________________________________________________________

[3 marks]

2. Diagram 11.1 shows the arrangement of apparatus in an experiment to determine the relationship between the

extension, x of a spring, S with force, F . The relationship between x and F is shown in the graph in Diagram 11.2.

A law states that “ The extension of a spring is directly proportional to the force applied to stretch it if the elastic limit of the spring is not exceeded.”

(a) Name the law.

___________________________________________________________________________________ [ 2 marks]

(b) Mark a cross (X) on the graph in Diagram 11.2 to indicate the elastic limit of the spring. [ 1 mark]

(c) The spring stores energy when it is extended. Calculate the energy stored in the spring when it is extended by 8 cm.

[ 3 marks]

(d) Another spring identical to spring S is added to the arrangement as in Diagram 11.3. The experiment is then repeated.

Sketch a graph x against F, up to the elastic limit, for this experiment in Diagram 11.2. [ 2 marks]

Diagram 11.1 Diagram 11.2

Diagram 11.3

3. Diagram 12 shows a water tank that supplies water to a block of flats. The water flows to each unit of the flat due to water pressure.

Diagram 12(a) What is meant by pressure?

__

[2 marks](b) A water tank with a height of 3.0 m is fully filled with water.

Calculate the water pressure at the base of the water tank. [Density of water = 1 000 kg m-3]

[3 marks] (c) Based on Diagram 12, compare the water pressure at P and at Q. Explain your answer.

[3 marks]

-END OF QUESTION PAPER-

Prepared by,

______________(NAZIRAH ROHANIP)Physics Teacher

Verified by,

___________________(TN HJ MUSTAFA AL BAKRI BIN REIN)Head Department of Science & Mathematics

From objective questions, write your answer in this section.

1. 11.

2. 12.

3. 13.

4. 14.

5. 15

6. 16.

7. 17.

8. 18.

9. 19.

10. 20.