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 the product of force and time (Impulse = Force × Time).

Front

What are the units for momentum?

Back

The units for momentum are kg·m/s.

Front

What are the units for impulse?

Back

The units for impulse are Newton-seconds (N·s).

Front

State 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

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 do you calculate momentum?

Back

Momentum (p) is calculated using the formula p = mv, where m is mass and v is velocity.

Front

If a 4 kg ball is moving at 1 m/s and experiences an impulse of -5 N-s, what is its final velocity?

Back

The final velocity is -0.25 m/s.

Front

What is the formula for calculating impulse?

Back

Impulse (J) can be calculated using the formula J = F × Δt, where F is force and Δt is the time duration.

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.