Momentum and Impulse Test Review

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

How does increasing the time of impact affect force?

Back

Increasing the time of impact decreases the force experienced by an object, as force is inversely proportional to the time of impact for a given impulse.

Front

What is the relationship between impulse and momentum?

Back

Impulse is equal to the change in momentum of an object, expressed as Impulse = Δp = p_final - p_initial.

Front

If an object has a final momentum of 45 kg m/s and an impulse of 45 kg m/s, what is its initial momentum?

Back

The initial momentum is 0 kg m/s.

Front

What is the formula for calculating change in momentum?

Back

Change in momentum (Δp) = Final momentum (p_final) - Initial momentum (p_initial).

Front

What happens to an egg dropped on water compared to one dropped on a hard surface?

Back

The egg dropped on water experiences less force and more time to come to a stop, reducing the likelihood of breaking.

Front

What is the unit of momentum?

Back

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

Front

What is the effect of airbags in a car during a collision?

Back

Airbags increase the time of impact, which reduces the force experienced by the occupants.

Front

Calculate the change in momentum for a 5.0 kg mass changing from 8.0 m/s east to 2.0 m/s east.

Back

Change in momentum = (5.0 kg)(2.0 m/s - 8.0 m/s) = -30 kg m/s west.