Impulse and Momentum

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. It is measured in Newton-seconds (N·s).

Front

What is momentum?

Back

Momentum is the product of an object's mass and its velocity. It is a vector quantity and is measured in kilogram-meters per second (kg·m/s).

Front

What is the impulse-momentum theorem?

Back

The impulse-momentum theorem states that the impulse on an object is equal to the change in momentum it causes.

Front

How do you calculate momentum?

Back

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

Front

If a 5 N force is applied for 2 seconds, what is the impulse?

Back

Impulse = Force × Time = 5 N × 2 s = 10 N·s.

Front

What happens to momentum in a closed system?

Back

In a closed system, the total momentum before an event is equal to the total momentum after the event, according to the law of conservation of momentum.

Front

What is the difference between elastic and inelastic collisions?

Back

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

Front

How does mass affect momentum?

Back

Momentum is directly proportional to mass; as mass increases, momentum increases if velocity remains constant.

Front

What is the unit of impulse?

Back

The unit of impulse is Newton-seconds (N·s).

Front

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

Back

It is an inelastic collision.