AP Physics Work-Energy Quick Review

Kinetic Energy is defined as

• Energy stored due to its location
• Energy of motion
• Energy stored in the bonds of molecules
• Heat energy

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Which of the following objects has the most kinetic energy?

• A 20 kg toddler running at 5 m/s
• A 50 kg toddler running at  30 m/s
• A 90 kg toddler running at 30 m/s
• A 100 kg  toddler running at 2 m/s

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You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?

• Potential Energy
• Kinetic Energy
• Nuclear Energy
• Chemical Energy

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The unit for energy and work is

• J

• N

• m/s

• m/s/s

A 5 kg ball is lifted 12 m above the ground. It's gravitational potential energy is

• 60 J
• 600 J
• 17 J
• 2.4 J

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If you exert a force of 20 N to push a desk 10 m, how much work did you do to the desk?

• 20 N
• 200 N
• 200 J
• 2 J

The law of conservation states that

• every action has an equal and opposite reaction
• all matter has thermal energy
• energy cannot be created or destroyed, only changes form
• heat moves from an object of higher temperature to an object of lower temperature

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The ability to do work is called

• energy
• thermal
• kinetic
• potential

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Mechanical energy can be either potential or ________.

• Motion
• Kinetic
• Chemical
• Light

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Which position has the most kinetic energy?

• A
• G
• D
• B

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