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phys: clarify second power equation

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eggy 2020-11-09 13:46:05 -05:00
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@ -475,8 +475,8 @@ The types of energy involved may have varying values as long as their sum is fix
Power is a a scalar unit represented in **watts** ($\text{1 W}=\frac{\text{1 J}}{\text{1 s}}$), and it is **not energy**, but instead the work done over a time interval, or the rate of doing work. Power is a a scalar unit represented in **watts** ($\text{1 W}=\frac{\text{1 J}}{\text{1 s}}$), and it is **not energy**, but instead the work done over a time interval, or the rate of doing work.
$$P=\frac{\Delta E}{\Delta t}$$ $$P=\frac{\Delta E}{\Delta t}$$
Also: By rearranging units, power can also be represented in terms of force and velocity::
$$P=|\vec{F}|v$$ $$P=Fv$$
### Efficiency ### Efficiency