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5/30 MCQs for:

MECHANICS : MOTION - Conservation of Linear Momentum

Which of the following situations is a real-life application of the conservation of linear momentum?

A soccer ball being kicked by a player.

A moving object coming to rest due to friction.

A car accelerating on a highway.

A spaceship using its thrusters to change direction.

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?

0 kg·m/s.

5 kg·m/s.

15 kg·m/s.

10 kg·m/s.

The principle of conservation of linear momentum states that:

Momentum of each object in a system is conserved.

Momentum is conserved only when objects collide.

Total momentum increases in an isolated system.

Total momentum is always conserved in a closed system.

Which of the following is true about elastic collisions?

Some kinetic energy is lost.

Kinetic energy is conserved.

Momentum is not conserved.

The objects stick together.

What happens to the linear momentum of an object if its velocity doubles, while its mass remains constant?

The momentum is halved.

The momentum quadruples.

The momentum is unchanged.

The momentum doubles.