Momentum and Collisions

What is the formula for momentum?

Which of the following is a unit of momentum?

• Newton

• Joule

• Kilogram meter per second

• Watt

In a closed system, the total momentum before a collision is equal to the total momentum after the collision. This is known as:

• Newton's First Law

• Conservation of Energy

• Conservation of Momentum

• Conservation of Mass

If a 5 kg object is moving at 3 m/s, what is its momentum?

• 8 kg m/s

• 15 kg m/s

• 20 kg m/s

• 25 kg m/s

Which of the following statements is true about elastic collisions?

• Kinetic energy is not conserved.

• Momentum is not conserved.

• Both momentum and kinetic energy are conserved.

• Only potential energy is conserved.

A 2 kg ball moving at 4 m/s collides with a 3 kg ball at rest. If the collision is perfectly elastic, what is the total momentum after the collision?

• 8 kg m/s

• 12 kg m/s

• 16 kg m/s

• 20 kg m/s

What is the momentum of a 10 kg object moving at 0 m/s?

• 0 kg m/s

• 10 kg m/s

• 20 kg m/s

• 100 kg m/s

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

• Two billiard balls colliding and bouncing off each other

• A car crash where the cars stick together

• A rubber ball bouncing off the ground

• A perfectly elastic spring being compressed

In a perfectly inelastic collision, what happens to the kinetic energy?

• It is completely conserved.

• It is partially conserved.

• It is completely lost.

• It is converted into potential energy.

If two objects collide and stick together, what type of collision is it?

• Elastic

• Inelastic

• Perfectly elastic

• Perfectly inelastic