G7 Quiz#2 Collision

Two cars collide with each other and they stick together afterwards. This is an elastic collision.

• T

• F

Elastic collisions are very common in real life.

• T

• F

Momentum of the system is NOT conserved in an inelastic collision.

• T

• F

You can expect to hear sound in a perfect elastic collision.

• T

• F

Momentum of the system is always conserved regardless of what type of collision.

• T

• F

In a collision, if the initial KE of the system is greater than the final KE of the system, this is an inelastic collision.

• T

• F

In a collision, if the initial KE of the system is smaller than the final KE of the system, this is a _?

• inelastic collision

• elastic collision

• What? That is NOT possible!

A billiard ball of 0.5kg travelling 2m/s right collides with an identical stationary ball. After collision they swap velocity. Use calculation to show this is a _ collision?

• inelastic

• elastic

A car of 50kg travelling right at 3m/s collides with another car of 25kg at rest. After collision they stick together. Find the final velocity of the cars after sticking together.

• 2m/s

• -2m/s

• 3m/s

• 0

A car of 50kg travelling right at 3m/s collides with another car of 25kg at rest. After collision they stick together. Find the initial KE of the system

• 225J

• 75J

• 450J

• 0