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5/30 MCQs for:

MECHANICS : MOTION - Conservation of Linear Momentum

If two ice skaters push off from each other, what happens to their total momentum?

It remains the same.

It decreases.

It increases.

It becomes zero.

What is the momentum of a stationary object?

It is equal to the object’s velocity.

It depends on the mass.

It is equal to the object’s weight.

Zero.

A 2 kg object moves with a velocity of 5 m/s. If it collides elastically with a 3 kg object initially at rest, what is the total momentum of the system after the collision?

5 kg·m/s.

0 kg·m/s.

15 kg·m/s.

10 kg·m/s.

Which of the following statements is true about the principle of conservation of linear momentum?

Momentum is conserved only when objects do not collide.

Momentum is conserved only in elastic collisions.

Momentum is conserved when external forces are acting on the system.

Momentum is conserved in both elastic and inelastic collisions.

The principle of conservation of linear momentum states that:

Momentum is conserved only when objects collide.

Momentum of each object in a system is conserved.

Total momentum is always conserved in a closed system.

Total momentum increases in an isolated system.