Dorsey Impulse & Momentum test prep

Front

What is the principle of conservation of momentum?

Back

In a closed system, the total momentum before an event (collision or explosion) is equal to the total momentum after the event.

Front

Define impulse in physics.

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 is the formula for calculating momentum?

Back

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

Front

What type of collision is characterized by objects sticking together?

Back

Inelastic collision.

Front

How do you calculate the impulse experienced by an object?

Back

Impulse can be calculated using the formula: Impulse = Change in momentum = Final momentum - Initial momentum.

Front

What is the difference between elastic and inelastic collisions?

Back

In elastic collisions, kinetic energy is conserved, while in inelastic collisions, kinetic energy is not conserved.

Front

If a 0.250 kg cart is moving at 0.400 m/s, what is its momentum?

Back

0.1 kg-m/s.

Front

Which has greater momentum: a 0.15 kg object rolling at 2 m/s or a 0.4 kg object rolling at 1 m/s?

Back

A 0.4 kg object rolling at 2 m/s has greater momentum.

Front

What happens to momentum in a perfectly elastic collision?

Back

Both momentum and kinetic energy are conserved.

Front

What is the unit of momentum?

Back

The unit of momentum is kg-m/s.