Momentum and Impulse

Which of the following has the MOST momentum? (assume the same velocity for each of the objects)

• rolling ping-pong ball

• rolling bowling ball

• rolling soccer ball

• rolling basketball

The difference between a car hitting a wall vs. a car hitting a hay stack is...

• the impulse on the car hitting the wall is greater

• the change in momentum of the car hitting the wall is greater

• the force on the car hitting the hay stack is greater

• the collision time of the car hitting the hay stack is greater

The units for impulse are...

• N/s

• N⋅s

• N

• m/s

Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds.  Which cart experiences the greatest impulse?

• Cart B
• Cart A
• they are the same

The purpose of crumble zones on a car is to...

• decrease time of impact.

• increase force of impact.

• increase the time of impact.

• decrease the impulse during impact.

Can a bullet have the same momentum as a truck?

• yes

• no

An object with a mass of 2000 kg at rest has what momentum?

• 2000 kg m/sec
• 0 kg m/sec
• 2000 kg
• 2000 m/sec

When the speed of an object is doubled, its momentum

• remains unchanged in accord with the conservation of momentum.
• doubles
• quadruples
• decreases

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s. Calculate the impulse on the ball.

• 1 N⋅s

• 6 N⋅s

• 33.3 N⋅s

How can a tennis ball and a bowling ball have the same momentum?

• have the same speed and different directions

• have different speeds, but the same direction

• one is moving backwards

• they can't