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15 Cards in this Set
- Front
- Back
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Work |
How much force is applied • distance moved |
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Joule |
Newton-meter |
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Power |
Amount of work done ÷ time |
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Watt |
1 joule per second |
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Energy |
The ability to do work |
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Does work have to happen for something to possess energy? |
No |
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Potential energy |
Stored energy based on an objects position |
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Kinetic energy |
Energy possessed by moving objects |
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Kinetic energy formula |
1/2 mass • speed^2 |
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Gravitational potential energy |
Potential energy due to an elevated position Weight • height |
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Work-energy theorem |
Relationship between work and changes in energy Work = change in energy |
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Law of conservation of energy |
Energy can be transferred, but is never created or destroyed |
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Machine |
A device that multiplies or changes the direction of force Does not create energy |
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Efficiency |
Work done ÷ energy used |
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Example of efficiency |
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