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

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 the product of force and the time duration of its application.

Front

What are elastic collisions?

Back

Elastic collisions are collisions in which the total kinetic energy and momentum are conserved, and the objects bounce off each other.

Front

What are inelastic collisions?

Back

Inelastic collisions are collisions in which momentum is conserved, but kinetic energy is not; the objects may stick together after the collision.

Front

What is the unit of impulse?

Back

Impulse is measured in Newton-seconds (N*s).

Front

How does increasing the time of impact reduce injury in collisions?

Back

Increasing the time of impact reduces the force experienced by the body, as force is equal to the change in momentum divided by the time taken for that change.

Front

What happens to momentum in a closed system during a collision?

Back

In a closed system, the total momentum before the collision is equal to the total momentum after the collision.

Front

What is the relationship between force and impulse?

Back

Impulse is equal to the change in momentum, which can also be expressed as the product of force and the time duration over which the force acts.

Front

How do you calculate momentum?

Back

Momentum (p) is calculated using the formula p = mv, where m is mass in kilograms and v is velocity in meters per second.

Front

What is the principle of conservation of momentum?

Back

The principle of conservation of momentum states that in the absence of external forces, the total momentum of a system remains constant.