Master Class 9 Science – Force and Laws of Motion with Our MCQ Mock Test!

Do you clearly understand how forces act, interact, and cause motion? Test your concepts with this MCQ-based mock test on Force and Laws of Motion, designed according to the latest Class 9 Science syllabus. This test covers all key topics — balanced and unbalanced forces, Newton’s three laws of motion, inertia, momentum, and their mathematical applications in real-life situations.

Each question is thoughtfully designed to enhance your conceptual clarity, boost analytical thinking, and prepare you for exam-level challenges. With this test, you’ll get a complete practice experience that helps improve accuracy, speed, and confidence before exams.

Attempt now and strengthen your understanding of Force and Laws of Motion – the foundation of Physics!

1. Calculate the change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s.

 
 
 
 

2. A plate, a ball and a child all have the same mass. The one having more inertia is the

 
 
 
 

3. A force of 20 N changes the position of a body. If mass of the body is 2 kg, find the acceleration produced in the body.

 
 
 
 

4.

A ball of mass 500 g is thrown upwards with a velocity of 15 ms–1. Calculate its momentum at the highest point.

 
 
 
 

5. Rocket works on the principle of conservation of

 
 
 
 

6. Two equal masses m each moving in the opposite direction with the same speed v collide and stick to each other. The velocity of the combined mass is

 
 
 
 

7. The incorrect option regarding action-reaction pair is

 
 
 
 

8. A passenger in a moving train tosses a coin which falls behind him. It means that motion of the train is

 
 
 
 

9. According to second law of Newton, force is the cause and the outcome is

 
 
 
 

10. When no external force acts on an object, the physical quantity that remains conserved is

 
 
 
 

11. Bags at the top of a school van are tied using a string to avoid the effect of

 
 
 
 

12. The minimum number of unequal forces that can make zero resultant is

 
 
 
 

13. The one which has the least inertia among the following

 
 
 
 

14. Action and reaction forces act on the same body. [True/False]

 
 

15. A ball of mass m hitting the ground with a velocity u, bounces back with a velocity v in a small time interval ‘t’, the force exerted on the ground is

 
 
 
 

16. When a 12 N force acts on 3 kg mass for a second, the change in velocity is (in m/s)

 
 
 
 

17. One can move a body with constant speed on a rough surface with frictional force F by applying a force of

 
 
 
 

18. An object of mass 2 kg is sliding with a constant velocity of 4 ms–1 on a frictionless horizontal table. The force required to keep the object moving with the same velocity is

 
 
 
 

19. The two states of motion treated alike by the Newton’s first law, among A, B, C and D are

A : Rest
B : Uniform motion
C : Uniformly accelerated
D : Non-uniformly accelerated
 
 
 
 

20. If force, change in momentum and time are given by F, p and t respectively, then they are related by

 
 
 
 

21. The v – t graph of a body of 5 kg moving with the help of a force is shown. Then the force involved is

 
 
 
 

22. Newton’s __________ law is called the real law of motion.

 
 
 
 

23. A body of mass 9 kg is lying on a surface of table. Calculate the net force acting on it.

 
 
 
 

24. A mass M breaks into two pieces in the ratio 1 : 3 while at rest. If the heavier has a speed of v, the speed of the lighter is

 
 
 
 

25. On a 3 kg mass, 5 newton of force acts for 0.1 second. The impulse imparted to the mass is (in kg m/s)

 
 
 
 

26. A water tanker filled up to rd of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would

 
 
 
 

27. Impulse is the other name of

 
 
 
 

28. Water drops sticking to the wheel come out along the tangential line due to

 
 
 
 

29. Which of the following does not happen? As an automobile accelerates suddenly,

 
 
 
 

30. While catching a stone thrown by your friend you pull the hands back to

 
 
 
 

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