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Definition: Power is the time rate of doing work or, the amount of
work done per second.
Average Power:
where t is the time interval in which the work is done.
Instantaneous Power:
Note:
- Power is a scalar.
- SI Units: 1 Watt
( W ) = 1 Joule/sec = 1 kg m ^{2}/ s ^{3}
- British Engineering Units: 1 horsepower
( hp ) = 746 W .
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10/9/1997