# MCQ Questions Based on Momentum Conservation Principle for Class 9 Science

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Here we are providing MCQ Questions Based on Momentum Conservation Principle for Class 9 Science. Students can practice these Topicwise MCQ Questions to understand the topic well. Answers are also provided so that student can check their answer after completing these questions.

The principle of momentum conservation states that the total momentum of a system remains constant unless an external force is applied. This means that the total momentum of a group of objects will remain unchanged unless an outside force acts on the system.

For example, consider two objects colliding. Before the collision, the objects have a certain amount of momentum based on their mass and velocity. After the collision, the momentum of the objects may change due to the force of the collision, but the total momentum of the system (the two objects) remains the same. This is because the change in momentum of one object is equal in magnitude and opposite in direction to the change in momentum of the other object, resulting in no net change in the total momentum of the system.

## MCQ Questions Based on Momentum Conservation Principle

Q.1. What is the principle of momentum conservation?
A. The total momentum of a system remains constant unless an external force is applied.
B. The total energy of a system remains constant unless an external force is applied.
C. The total mass of a system remains constant unless an external force is applied.
D. The total velocity of a system remains constant unless an external force is applied.

Q.2. When two objects collide, the momentum of the system is _________.
A. Increased
B. Decreased
C. Transferred
D. Conserved

Q.3. What happens to the total momentum of a system when two objects collide and stick together?
A. It increases
B. It decreases
C. It remains the same
D. It depends on the masses and velocities of the objects.

Q.4. When a collision is perfectly inelastic, what happens to the total kinetic energy of the system?
A. It increases
B. It decreases
C. It remains the same
D. It is transferred to another form of energy.

Q.5. When a collision is perfectly elastic, what happens to the total kinetic energy of the system?
A. It increases
B. It decreases
C. It remains the same
D. It is transferred to another form of energy.

Q.6. When a ball bounces off a wall, the ball’s momentum __________.
A. Increases
B. Decreases
C. Changes direction
D. All of the above

Q.7. When a bullet is fired from a gun, the gun experiences a recoil due to the __________ of momentum.
A. Conservation
B. Transfer
C. Increase
D. Decrease

Q.8. A rocket lifting off the ground experiences an equal and opposite force due to the __________ of momentum.
A. Conservation
B. Transfer
C. Increase
D. Decrease

Q.9. A car crashing into a brick wall will experience a greater force if the car is __________.
A. Lighter
B. Heavier
C. Faster
D. Slower

Q.10. If a skater pushes off a wall with more force, they will __________ more momentum.
A. Gain
B. Lose
C. Transfer
D. None of the above

Q.11. When a hammer hits a nail, the nail experiences a greater force if the hammer is __________.
A. Lighter
B. Heavier
C. Faster
D. Slower

Q.12. If two objects with the same mass collide and one has a greater velocity, the object with the greater velocity will __________ more momentum.
A. Gain
B. Lose
C. Transfer
D. None of the above

Q.13. If two objects with the same mass collide and one has a lower velocity, the object with the lower velocity will __________ more momentum.
A. Gain
B. Lose
C. Transfer
D. None of the above

Q.14. If two objects with different masses collide and one has a greater velocity, the object with the __________ mass will transfer more momentum.
A. Greater
B. Lesser
C. Both will transfer the same amount of momentum
D. It depends on the velocities of the objects.

Q.15. If two objects with different masses collide and one has a lower velocity, the object with the __________ mass will transfer more momentum.
A. Greater
B. Lesser
C. Both will transfer the same amount of momentum
D. None of these

1. A. The total momentum of a system remains constant unless an external force is applied.
2. D. Conserved
3. C. It remains the same
4. D. It is transferred to another form of energy.
5. C. It remains the same
6. D. All of the above
7. A. Conservation
8. A. Conservation
9. B. Heavier
10. A. Gain
11. B. Heavier
12. B. Lose
13. A. Gain
14. A. Greater
15. B. Lesser
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