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5/30 MCQs for:

MECHANICS : MOTION - Conservation of Linear Momentum

In which of the following situations does the conservation of momentum apply?

A collision between two billiard balls.

A parachute slowing down a falling object.

A rocket using fuel to accelerate in space.

A car accelerating down a hill.

Which of the following is true about elastic collisions?

The objects stick together.

Momentum is not conserved.

Kinetic energy is conserved.

Some kinetic energy is lost.

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?

15 kg·m/s.

5 kg·m/s.

10 kg·m/s.

0 kg·m/s.

The principle of conservation of linear momentum states that:

Total momentum increases in an isolated system.

Momentum is conserved only when objects collide.

Total momentum is always conserved in a closed system.

Momentum of each object in a system is conserved.

Which statement is true about momentum in a closed system?

It is always conserved in all types of collisions.

It is not conserved in inelastic collisions.

It remains constant only in elastic collisions.

It is conserved when external forces are present.