Unit 2 Review: Momentum and Collisions

What is the unit for momentum?

• m/sec
• kg/sec
• kg/m
• kg m/sec

Tags

NGSS.HS-PS2-2

In a collision, the impulse is ______ the object's change in momentum

• Greater than

• Equal to

• less than

• always double

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NGSS.HS-PS2-2

The equation to calculate momentum is

• p=mv
• p=1/2mv²
• p=mgh
• p=mg

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NGSS.HS-PS2-2

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

• size and shape

• mass and acceleration

• mass and veloctiy

• mass and energy

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NGSS.HS-PS2-2

Which object listed below has the greatest momentum?

• A 0.05 kg object rolling at 0.2 m/s.
• A 0.15 kg object rolling at 2 m/s.
• A 0.15 kg object rolling at 1 m/s
• A 0.4 kg object rolling at 2 m/s.

Tags

NGSS.HS-PS2-2

A 2 kg cart has a momentum of 10 kg m/s. What is its velocity?

• 22 m/s
• .2 m/s
• 5.0 m/s
• 20 m/s

Tags

NGSS.HS-PS2-2

A 2.5 kg ball moving at 5 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision.  What is the velocity of the second ball after the collision? 

• 5 m/s
• 2.5 m/s
• 10 m/s
• 7.5 m/s

Tags

NGSS.HS-PS2-2

Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?

• car

• bike

• they are equal

• cannot determine using the info provided

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NGSS.HS-PS2-2

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.

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NGSS.HS-PS2-1

NGSS.HS-PS2-3

An egg is thrown at a wall and at a bed sheet. The force of impact will be

• Greater against the wall

• Greater against the sheet

• Force is equal

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3