Momentum and Impulse Progress Check

What are the units for momentum?

• J

• m/s

• kg-m/s

• N

A car crashes into a wall and comes to a complete stop. How could the force experienced by the passengers be decreased?

• Decreasing the time it takes the car to come to a complete stop

• Increasing the time it takes for the car to come to a complete stop

The impulse is ______ the change in momentum

• greater than
• equal to
• less than
• always double

The momentum of an object depends upon the object's ___________&_____________.  

• size and shape
• mass and speed
• mass and velocity
• mass and energy

A 2 kg cart has a momentum of 16 kg m/s. What is its velocity?

• 8 m/s
• 32 m/s
• 0.125 m/s
• 18 m/s

An impulse depends on

• weight and force

• force and time

• electric charge and time

• none of these

An object having a p_i of 30kg m/s has ended with a p_f of 40 kg m/s. What impulse caused this?

• 2kg m/s

• 10kg m/s

• 70kg m/s

• 5kg m/s

The air bag on a car reduces the force experienced by the driver, by extending the time of impact.

• True

• False

Which has more momentum?

• A parked semi truck

• A moving car

• they have the same amount of momentum

T/F:  A big truck will always have more momentum than a small car.

• True
• False