Chapter 2 Force and Motion (Form 4)

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Disediakan Oleh: Cikgu LimCY (Guru Cemerlang Fizik)

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1.Diagram below shows four positions of a vaulter during a jump.In which position is the kinetic energy of the vaulter becomes maximum? *

1 point

2.A force is applied to an object.Which of the following cannot occur? *

1 point

A The object speeds up

B The shape of the object changes

C The mass of the object decreases

D The object changes its direction of motion

3.Diagram below shows a squid that executes an emergency escape by ejecting a black fluid towards its enermy.Which of the following principle explained the emergency escape of the squid? *

1 point

A Principle of Superposition

B Principle of Conservation of Momentum

C Principle of Conversation of Energy

4.Diagram below shows a catapult that is aim to a chicken.A 5 N force is applied to the catapult to produce an extension of 10 cm in the elastic cord, calculate the elastic potential energy stored in the elastic cord. *

1 point

A 0.010 J

B 0.015 J

C 0.020 J

D 0.025 J

5.Diagram below shows a student throws an egg towards a piece of cloth that is supported by two of his friends.Which of the following explained why the egg doesn’t break? *

1 point

A Both the cloth and the egg shell are made of soft material

B The egg has negligible momentum

C The cloth lengthen the impact time so impulsive force is reduced

D The cloth shorten the impact time so impulsive force is reduced

6.Diagram below shows a boy sitting on a chair. The weight of the boy, W acts vertically downward.Name the force, R that balanced the weight, W. *

1 point

A Frictional force

B Resistance

C Normal reaction

D Impulsive force

7.Diagram below shows two trolleys each of mass 1 kg, before and after collision. The initial velocity of trolley A and trolley B are 6 m s-1 and 4 ms-1 respectively. After collision, both trolleys move together.What is the velocity of both trolleys after collision? *

1 point

A 1.0 m s-1

B 2.0 m s-1

C 5.0 m s-1

D 10.0 m s-1

8.Diagram below shows an astronaut walking on the moon. What can you say about his inertia? *

1 point

A Increases

B Decreases

C Unchanged

9.Diagram below shows the velocity-time graph of an object.Which displacement-time graph represents the same motion as the object? *

1 point

10.Diagram below shows a strip of ticker tape.Which statement describes the motion shown by the ticker tape? *

1 point

A Acceleration

B Deceleration

C Uniform velocity followed by deceleration

D Acceleration followed by uniform velocity

11.Which graph shows motion with uniform velocity? *

1 point

A P and S

B P and R

C Q and S

D Q and R

12.Which diagram shows three forces in equilibrium? *

1 point

13.Which of the following ticker tapes describes a motion with a deceleration? *

1 point

14.Diagram below shows the velocity-time graph of the motion of an object.Which of the following acceleration-time graphs describes the motion of the object? *

1 point

15.Diagram below shows two identical trolleys, P and Q with masses of 1 kg on a frictionless plane. Trolley P is moving with a velocity of 5 ms-1 in an opposite direction.Trolley P and trolley Q collide with each other and then move together with a common velocity, v. What is the magnitude of v? *

1 point

A 2.5 m s-1

B 5.0 m s-1

C 7.0 m s-1

D 15.0 m s-1

16.Diagram below shows a system consists of three identical springs. The original length of each spring is 10 cm. With a load of 50 g, each spring is stretched to 14 cm.What is the total length, X of the springs in diagram? *

1 point

A 21 cm

B 24 cm

C 26 cm

D 28 cm

17.A ball of mass 0.5 kg is being kicked by a force of 10 N.If the time of impact is 0.2 s, what is the impulse experienced by the ball? *

1 point

A 0.8 N s

B 2.0 N s

C 25.0 N s

D 50.0 N s

18.Diagram below shows a tape chart which is produced by a moving trolley. The frequency of the ticker-tape timer is 50 Hz and each strip of ticker tape contains 5 ticks.What is the trolley’s acceleration? *

1 point

A 20 cm s-2

B 200 cm s-2

C 240 cm s-2

D 400 cm s-2

19.Which of the following graphs show the relationship between the acceleration and height for an object that undergoes free fall to the ground? *

1 point

20.Diagram below shows a velocity-time graph of an object moving along a straight line.What is the total displacement of the object in the first 10 seconds? *

1 point

A -25 m

B 50 m

C 75 m

D 25 m

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