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Mathematically, average power is expressed as:
Mathematically, average power is expressed as:
P = W / Δt
P = ''W'' / Δt
Therefore, power at any instant can be determined by the equation:
Therefore, power at any instant can be determined by the equation:
P = lim<sub>Δt->0</sub> W / Δt = dW / dt
P = lim<sub>Δt->0</sub> ''W'' / Δt = dW / dt
Since W = [[Force|F]] d[[distance|x]] and [[Velocity|v]] = dx / dt follows that:
Since d''W'' = [[Force|F]] d[[distance|x]] and [[Velocity|v]] = dx / dt follows that:
P = F dx / dt = F v
P = F dx / dt = F v