Review: Momentum and Impulse

Front

What is momentum?

Back

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

Front

How does impulse relate to momentum?

Back

Impulse is the change in momentum of an object when a force is applied over a period of time. It is calculated as the product of the average force and the time duration of the force application.

Front

What is the formula for calculating momentum?

Back

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

Front

If two objects have the same mass, what can be said about their momentum if one is moving faster?

Back

The faster moving object has more momentum.

Front

What happens to the momentum of an object if its velocity doubles?

Back

If the velocity of an object doubles, its momentum also doubles, assuming mass remains constant.

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 (like a collision) is equal to the total momentum after the event.

Front

How does an airbag reduce the force experienced by a driver during a collision?

Back

An airbag reduces the force experienced by a driver by increasing the time of impact, which decreases the average force according to the impulse-momentum theorem.

Front

Calculate the momentum of a 1500 kg car moving at 25 m/s.

Back

The momentum is 37500 kgm/s (p = mv = 1500 kg * 25 m/s).

Front

What is the unit of momentum?

Back

The unit of momentum is kilogram meter per second (kgm/s).

Front

What is impulse?

Back

Impulse is the product of the average force applied to an object and the time duration over which the force is applied, represented by the formula Impulse = Force × Time.