Energy, Work and Power

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Physics

Energy, Work and Power

GCSE

IGCSE

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10 Terms

1
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Efficiency
________: how much useful work is done with energy supplied.
2
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Power
________: is the rate at which a machine transfers energy.
3
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→Because work
________ done is equal to energy transferred, the power is also equal to the rate of doing work.
4
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Energy
 amount of work and its measured in Joules (J)
5
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Conservation of energy
energy cannot be created or destroyed, when work is done, energy is changed from one form to another
6
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Efficiency
how much useful work is done with energy supplied
7
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Renewable sources
Energy sources that are not exhaustible/ Infinite
8
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Non-renewable sources
Energy sources that are exhaustible/ finite
9
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Work
Work is done whenever a force acts on an object that moves (or is moving) in the direction of the force
10
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Power
is the rate at which a machine transfers energy