Momentum-Impulse Do Now

What is impulse?

• The final momentum in a system

• The initial momentum in a system

• The force acted upon a system

• The force acted upon a system over a given time period

WHat are the units for momentum?

• Kg*m/s

• m/s

• N

What is the momentum of a 10 kg object that is moving at 4 m/s

• 20

• 5

• 2.5

• 40

A 1 kg object is moving at 2 m/s. An impulse of 6 N*sec is applied to the object. The object's new velocity is

• -4

• 4

• 6

• 8

A 10 kg cart is moving at 10 m/s and comes to a stop. Pick the scenario, in which the force required to stop the car is the largest?

• Stopping the car in 4 seconds

• Stopping the car in 3 seconds

• Stopping the car in 2 seconds

• Stopping the car in 1 seconds

If the impulse on a system is 20 N*s, the change in momentum is ....

• 20

• 10

• 40

• 5

The reason a gymnast bends their knees when they jump off the balance beam is to

• Increase the time it takes to change their momentum

• Decrease the time it takes to change their momentum

• Make the change in momentum smaller

• Make the change in momentum larger