Momentum/Impulse Flashcard

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 Impulse = Force × Time.

Front

What are the units of momentum?

Back

The units of momentum are kg m/s (kilogram meter per second).

Front

What are the units of impulse?

Back

The units of impulse are N-s (Newton second).

Front

What is the principle of conservation of momentum?

Back

The principle 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

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.

Front

How do you calculate the impulse given force and time?

Back

Impulse can be calculated using the formula Impulse = Force × Time.

Front

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

Back

Impulse = 5 N × 2 s = 10 N-s.

Front

What happens to momentum when two objects collide?

Back

The total momentum of the two objects before the collision is equal to the total momentum after the collision, assuming no external forces act on them.