Unit 2 - Motion Review #1

Front

What is always constant in any collision?

Back

Total momentum.

Front

Why does a ball eventually stop when rolled down a hallway?

Back

Because of friction and air resistance.

Front

How do you calculate momentum?

Back

Momentum = mass × velocity.

Front

What is the momentum of a 1000-kg car moving northward at 20 m/s?

Back

20000 kg * m/s north.

Front

What does the momentum of an object depend on?

Back

Mass and velocity.

Front

What is an example of an inelastic collision?

Back

A student runs across the grocery store and jumps onto the back of a shopping cart.

Front

What is Newton's First Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is friction?

Back

A force that opposes the motion of an object.

Front

What is air resistance?

Back

A type of friction that acts on objects as they move through the air.

Front

What is kinetic energy?

Back

The energy an object has due to its motion.