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The POWER of a machine depends on:
(a) how much energy it gives to the load
(b) how long it took to give it this energy

The more powerful a machine the less time it takes to convert a given amount of energy from one from to another

Power is the RATE at which work is done and energy converted from one form to another.
Power = work done/ time taken = energy converted/time taken

The units for power are joules /second or WATTS. 1 joule/second = 1 watt
Larger powers are measured in kW or MW.
1 kilowatt (kW) = 1000 W.
1 Megawatt (MW) = 1000 000 W

© Keith Gibbs 2009