Momentum and Impulse

Front

What is the formula for momentum?

Back

p = mv, where p is momentum, m is mass, and v is velocity.

Front

Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?

Back

A bike moving at 15 mph has more momentum.

Front

What are the units used for measuring momentum?

Back

The units for momentum are kg m/s.

Front

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

Back

The momentum doubles.

Front

What is impulse in physics?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time.

Front

What is the relationship between force and impulse?

Back

Impulse is equal to the force applied multiplied by the time duration of the force: Impulse = Force × Time.

Front

If a 5 N force is applied to a 3 kg ball to slow it down from 9 m/s to 3 m/s, what is the impulse on the ball?

Back

The impulse on the ball is -18 N⋅s.

Front

What is the principle of conservation of momentum?

Back

The total momentum of a closed system remains constant if no external forces act on it.

Front

How does mass affect momentum?

Back

Momentum increases with an increase in mass, given the same velocity.

Front

What is the effect of a net external force on momentum?

Back

A net external force changes the momentum of an object.