Collisions

The momentum of an object depends upon the object's ___________&_____________.

• size and shape

• mass and speed

• mass and veloctiy

• mass and energy

If two objects have the same mass, then the faster moving object has ____________ momentum.

• more 
• less
• the same

Jorge noticed a collision outside the coffee shop where two cars collided and stuck together.  What type of collision did he observe?

• Elastic
• Inelastic
• Completely inelastic
• none

While playing pool, Emma notices that the pool balls bounce apart.  What type of collision is this?

• Elastic
• Inelastic
• Explosive
• Force

An asteroid travels at 6,000 meters in 10 seconds. What is the speed?

• 60 meters/seconds

• 60 seconds/meter

• 600 meters/second

• 6 meters/second

You do not know an object's velocity until you know it's

• Speed

• Reference point

• Speed and direction

• Acceleration

The Law of Conservation of Momentum states that the amount of momentum in a system is ___________________ before and after a collision.

• greater

• decreased

• the same

• unknown

No collision is either perfectly elastic or perfectly inelastic.

• True

• False

In a two-body collision,

• momentum is always conserved

• kinetic energy is always conserved

• neither momentum nor kinetic energy is conserved

• both momentum and kinetic energy are always conserved

A person sitting in a chair with wheels stands up, causing the chair to roll backward across the floor. The momentum of the chair

• was zero while stationary and increased when the person stood

• was greatest while the person sat in the chair

• remained the same

• was zero when the person got out of the chair and increased while the person sat