4.2.3 Conservation of Momentum

Front

What happens to the momentum of an object when its speed is doubled?

Back

The momentum doubles.

Front

What is the formula for calculating momentum?

Back

Momentum (p) = mass (m) × velocity (v)

Front

What is the unit of momentum?

Back

kg m/s

Front

Is momentum a scalar or vector quantity?

Back

Momentum is a vector quantity.

Front

What two factors does momentum depend on?

Back

Momentum depends on mass and velocity.

Front

If a 9300 kg railroad car traveling at 5 m/s strikes a stationary 5000 kg boxcar, what is the speed of the second boxcar after the collision?

Back

9.3 m/s

Front

What principle states that the total momentum before a collision equals the total momentum after the collision?

Back

The Law of Conservation of Momentum.

Front

In a closed system, if one object gains momentum, what happens to another object?

Back

Another object must lose an equal amount of momentum.

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.