Practical Physics Impulse and Momentum

The units for momentum are

• kg
• m/s
• kg-m/s
• kg/m/s

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NGSS.HS-PS2-2

The units for Impulse are

• N/s
• N-s
• N
• m/s

The formula for momentum is

• mass divided by velocity
• mass multiplied by velocity
• velocity divided by mass
• Force times acceleration

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NGSS.HS-PS2-2

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

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NGSS.HS-PS2-2

Energy is lost during this type of collision

• elastic
• inelastic
• energy is lost in both types of collisions

Momentum is conserved in this type of collision

• elastic
• inelastic
• momentum is conserved in both types of collisions

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NGSS.HS-PS2-2

In this type of collision, objects tend to "stick" together.

• elastic
• inelastic 
• They "stick" together in both types of collisions

A 0.250 kg cart moving at 0.400 m/s has how much momentum?

• 0.1 kg-m/s
• 1 kg-m/s
• 10 kg-m/s
• 100 kg-m/s

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NGSS.HS-PS2-2

An open cart on a level surface is rolling without frictional loss through a vertical downpour of rain. As the cart rolls, an appreciable amount of rainwater accumulates in the cart. The speed of the cart will

• increase because of conservation of mechanical energy
• decrease because of conservation of momentum
• decrease because of conservation of mechanical energy
• remain the same because the raindrops are falling perpendicular to the direction of the cart's motion

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NGSS.HS-PS2-1

NGSS.HS-PS2-2

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

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NGSS.HS-PS2-1