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5/30 MCQs for:

MECHANICS : MOTION - Conservation of Linear Momentum

Which of the following is an example of an inelastic collision?

A hockey puck sliding on ice.

A rocket accelerating in space.

A ball bouncing off a wall.

Two cars colliding and sticking together.

A 50 kg astronaut is floating in space and pushes a 2000 kg satellite. What will happen to the astronaut?

The astronaut will move faster than the satellite.

The astronaut will move in the opposite direction.

The astronaut will move in the same direction as the push.

The astronaut will remain stationary.

What is the result of an explosion in a system where momentum is conserved?

The total momentum remains the same.

The system loses mass.

The total kinetic energy increases.

The objects combine into a single mass.

If a 2 kg object moving at 10 m/s collides with a stationary 3 kg object, and they stick together after the collision, what is their combined velocity?

4 m/s.

6 m/s.

10 m/s.

2 m/s.

Which statement is true about momentum in a closed system?

It is conserved when external forces are present.

It is always conserved in all types of collisions.

It is not conserved in inelastic collisions.

It remains constant only in elastic collisions.