Momentum, Impulse, Conservation of Momentum

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 is impulse defined?

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.

Front

What does the principle of conservation of momentum state?

Back

The total momentum of a closed system remains constant before and after a collision, meaning the total momentum before a collision equals the total momentum after the collision.

Front

What is an elastic collision?

Back

An elastic collision is a type of collision where both momentum and kinetic energy are conserved.

Front

What is an inelastic collision?

Back

An inelastic collision is a type of collision where momentum is conserved, but kinetic energy is not conserved; some energy is transformed into other forms.

Front

What is a completely inelastic collision?

Back

A completely inelastic collision is a type of collision where the colliding objects stick together after the collision, resulting in maximum kinetic energy loss.

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

If a force of 5 N is applied for 20 s, what is the impulse?

Back

Impulse = Force × Time = 5 N × 20 s = 100 Ns.

Front

What is the unit of momentum?

Back

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

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.