AP Physics: Momentum Set One

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = m × v.

Front

How do you calculate momentum?

Back

Momentum (p) is calculated using the formula: p = m × v, where m is mass and v is velocity.

Front

What is the unit of momentum?

Back

The unit of momentum is kilogram meter per second (kg·m/s).

Front

If an object has a mass of 10 kg and is moving at a velocity of 5 m/s, what is its momentum?

Back

The momentum is 50 kg·m/s (p = 10 kg × 5 m/s).

Front

What happens to momentum if the mass of an object increases while velocity remains constant?

Back

If mass increases and velocity remains constant, momentum increases.

Front

What is the principle of conservation of momentum?

Back

The principle of conservation of momentum states that in a closed system, the total momentum before an event is equal to the total momentum after the event.

Front

How does momentum relate to collisions?

Back

In collisions, the total momentum of the system before the collision is equal to the total momentum after the collision, assuming no external forces act on it.

Front

What is the difference between elastic and inelastic collisions in terms of momentum?

Back

In elastic collisions, both momentum and kinetic energy are conserved. In inelastic collisions, momentum is conserved, but kinetic energy is not.

Front

If a 2 kg object moving at 3 m/s collides with a stationary 2 kg object, what is the total momentum before the collision?

Back

The total momentum before the collision is 6 kg·m/s (p = 2 kg × 3 m/s).

Front

What is impulse?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time, calculated as impulse = force × time.