Work and Energy

Work equals force times

• matter

• weight

• power

• distance

Work is measured in units called

• Joules

• Power

• Force

• Newtons

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What is needed to calculate work?

• force

• distance

• time

• mass

Poe Tential and Ken Ettic are both moving boxes. Poe uses a force to push his box 10 m. Ken uses the exact same force to push his box 20 m. Who did more work?

• Poe

• Ken

• They did the same amount of work

• Nobody did any work

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Poe and Ken are at it again! This time Poe pushes his box with a force of 50 N. Ken pushes his box the exact same distance, but he only uses 20 N of force. Who did more work?

• Poe

• Ken

• They did the same amount of work

• Nobody did any work

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What is the ability to do work

• Power

• Energy

• Force

• Momentum

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What is mechanical energy?

• It is what metal creates when heated.
• All potential and kinetic energy in a system.
• It is motion of all matter.
• Energy of momentum.

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When I say Kinetic you think

• waves

• power

• motion

• apples

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Which has MORE kinetic energy? A 2 kg ball moving at 2 m/s or a 1 kg ball moving at 4 m/s?

• The 2 kg ball

• The 1 kg ball

• They have the same KE

• There is no way of knowing

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Another term for stored energy is

• Kinetic energy

• Power

• Heat energy

• Potential energy

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