NGSS.HS-PS2-2

A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?

• For every action there is an equal and opposite reaction.
• Every mass exerts a force on every other mass.
• An object at rest tends to stay at rest.
• Friction opposes the motion of an object.

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NGSS.HS-PS2-1

Even if an object has a smaller mass, it can have a larger momentum if it has a high _______.

• velocity

• displacement

• weight

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NGSS.HS-PS2-2

If both dogs have the same velocity, which one has the greater momentum?

• The brown dog

• The white dog

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Which has more momentum: a 3.0 kg sledgehammer swung at 1.5m/s, or a 4.0 kg sledgehammer swung at 0.9 m/s?

• the 3.0 kg sledgehammer

• the 4.0 kg sledgehammer

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NGSS.HS-PS2-2

A golf ball travels at 16 m/s while a baseball moves at 7 m/s. The mass of the golf ball is 0.045 kg and the mass of the baseball is 0.14 kg. Which has a greater momentum?

• golf ball

• baseball

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The equation for momentum is?

• momentum = force - mass

• momentum = acceleration / mass

• momentum = mass x acceleration

• momentum = mass x velocity

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Momentum before = Momentum after

according to the Law of Conservation of _______________.

• Momentum

• Energy

• Force

• Acceleration

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If the two cars have an ELASTIC COLLISION, which direction (if any) will they move?

• The will BOUNCE OFF and move LEFT

• They will STICK TOGETHER and move LEFT

• They will BOUNCE OFF and move RIGHT

• They will STICK TOGETHER and move RIGHT

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Two Pool Balls collide and then go separate directions.

• inelastic collision

• explosion

• elastic collision

• none of these

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What object will have more momentum a 1000 kg truck moving 7 m/s or a 500 kg car moving 10 m/s

• Truck

• Car

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