9.2 - Conservation of Momentum

Front

What is a system called when there is no external force on it?

Back

Isolated

Front

A large box with a mass of 4 kg slides across a frictionless surface with a velocity of 12 m/s and collides with a stationary smaller box with a mass of 2 kg. What is the velocity of the two combined masses after collision?

Back

8 m/s

Front

In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other. The orange cart has a velocity of 2.0 m/s and the blue cart has a velocity of -1.0 m/s. Calculate their final speed after they stick together.

Back

0.50 m/s

Front

Two skaters begin at rest. Skater 1 has a smaller mass than Skater 2. After they push off each other, who has a greater velocity?

Back

Skater 1 has a greater velocity than Skater 2.

Front

The Law of Conservation of Momentum states:

Back

The total momentum before a collision is equal to the total momentum after a collision.

Front

Define momentum.

Back

Momentum is the product of an object's mass and its velocity (p = mv).

Front

What is an elastic collision?

Back

An elastic collision is one in which both momentum and kinetic energy are conserved.

Front

What is an inelastic collision?

Back

An inelastic collision is one in which momentum is conserved, but kinetic energy is not.

Front

What happens to momentum in a closed system?

Back

In a closed system, the total momentum remains constant.

Front

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

Back

This is an inelastic collision.