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Reverted edits by GodIsAJealousSadist (Talk) to last version by Iduan
In physics, '''power''' refers to the rate of [[Work|transfer of energy]] respect to [[time]].<ref>Serway and Beichner, ''Physics For Scientists and Engineers'', Fifth Edition</ref>
Mathematically, average power is expressed as:
P = ''W'' / Δt
Therefore, power at any instant can be determined by the equation:
P = lim<sub>Δt->0</sub> ''W'' / Δt = dW / dt
Since d''W'' = [[Force|F]] d[[distance|x]] and [[Velocity|v]] = dx / dt follows that:
P = F · dx / dt = F · v
The usual units for power are [[Watts]] ( W = [[Joule|J]]/[[seconds|s]] ) and [[horsepower]] ( hp = 746 W )
==References==
<references/>
[[Category:Physics]]
[[Category:mechanics]]