Laws of Motion Quiz - CBSE Class 11 Physics

Free practice quiz: Laws of Motion (CBSE Class 11 Physics). 28 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 11 Physics practice quiz has 28 multiple-choice questions on Laws of Motion. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is Newton's first law of motion?

   1. A body at rest will remain at rest unless acted upon by an external force.
   2. Force equals mass times acceleration.
   3. For every action, there is an equal and opposite reaction.
   4. Energy cannot be created or destroyed.
   Show answer

   Answer: A. A body at rest will remain at rest unless acted upon by an external force.

2. If a 5 kg object experiences a force of 10 N, what is its acceleration?

   1. 2 m/s²
   2. 5 m/s²
   3. 10 m/s²
   4. 50 m/s²
   Show answer

   Answer: A. 2 m/s²

3. What principle can be derived from Newton's third law of motion?

   1. Energy is conserved.
   2. For every action, there is an equal and opposite reaction.
   3. Mass and energy are interchangeable.
   4. Mass increases with velocity.
   Show answer

   Answer: B. For every action, there is an equal and opposite reaction.

4. An object experiences a net force and accelerates. If the net force is doubled while the mass remains the same, what happens to the acceleration?

   1. It remains the same.
   2. It doubles.
   3. It halves.
   4. It quadruples.
   Show answer

   Answer: B. It doubles.

5. What happens to the acceleration of an object as its mass increases if the applied force remains constant?

   1. It increases.
   2. It decreases.
   3. It remains the same.
   4. It doubles.
   Show answer

   Answer: B. It decreases.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which of the following is an example of inertia?
2. If a net force acts on an object, what is the result according to Newton's second law?
3. What is the SI unit of force?
4. An object is in motion, and suddenly no net force acts on it. According to Newton's first law, what will happen to its motion?
5. When a car comes to a sudden stop, what phenomenon demonstrates the law of inertia?
6. A 10 kg object is pushed with a force of 15 N. If there is a frictional force of 5 N acting against it, what will be its acceleration?
7. How does increasing mass affect the acceleration of an object if the same force is applied?
8. If a rocket travels in space, what keeps it moving when the engines are off?
9. What happens to the momentum of an object if its mass doubles and its velocity remains constant?
10. What does the term 'inertia' refer to?
11. If a body is acted upon by a net force of zero, what will happen to its motion?
12. Which of the following statements accurately represents the second law of motion?
13. A 5 kg object is accelerated at 2 m/s². What is the net force acting on the object?
14. According to Newton's third law of motion, if object A exerts a force on object B, what happens?
15. In a collision, if two objects stick together and move as one mass, which type of collision is this?
16. If a car of mass 1000 kg is moving with a velocity of 20 m/s, what is its momentum?
17. Which factor does not affect the gravitational force between two objects?
18. If two forces of 5 N and 7 N act in the same direction on an object, what is the resultant force?
19. An astronaut throws a ball in a spacecraft. The ball moves away from the astronaut due to which law of motion?
20. A force of 10 N acts on a 2 kg object. What is the acceleration of the object?
21. How does gravitational force change if the distance between two objects is doubled?
22. In a frictionless environment, what happens to an object's horizontal velocity when no horizontal forces act on it?
23. An object moving in a circular path experiences which type of acceleration?

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