Work and Energy Quiz Review

Potential Energy is

• stored energy

• energy of motion

• always the same as kinetic energy

• never lost

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The correct unit of energy is

• Watts

• Pounds

• Horsepower

• Joules

A 300 N dog

• has a mass of 300 N

• has a mass of 300 kg

• has a weight of 300 N

• has a weight of 300 kg

The rate at which energy is transferred is called

• joules.

• power.

• work.

• time.

The energy associated with motion is called

• gravitational potential energy.

• kinetic energy.

• elastic potential energy.

• nuclear energy.

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A change from one form of energy into another is called

• an energy transformation.

• energy conservation.

• work.

• an energy increase.

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What happens to the energy of a ball as it is dropped from a height of 10 m?

• Potential energy is transformed into mechanical energy.

• Mechanical energy is transformed into potential energy.

• Potential energy is transformed into kinetic energy.

• Kinetic energy is transformed into potential energy.

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A man weighing 80 kg is running at a speed of 4 m/s. What is the man’s kinetic energy?

• 1280 J

• 640 J

• 160 J

• 320 J

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A ball is about to roll down a ramp. What happens to the transfer of potential energy to kinetic energy if you make the ramp steeper?

• No change

• Kinetic energy increases

• Kinetic energy decreases

• There is no kinetic energy

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A large truck and a small car are moving at the same speed. The truck has greater kinetic energy because its __________ is greater.

• thermal energy

• height

• gravity

• mass

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