Power = 1165.44 W
How do you calculate power delivered by a force?
- Power can be characterized as the speed at which work is completed or energy is consumed.
- Since one unit of energy must be required to perform one unit of labor, these two definitions are identical. It is frequently practical to compute the average power.
- Work is the result of a force creating a displacement.
- The length of time that this force exerts to generate the displacement has nothing to do with work.
- The pace of the process can vary from being completed quickly to taking a while.
- A rock climber, for instance, takes an unusually lengthy time to raise her body a few meters up the cliff's edge.
a) Power P = Work done(W)/time taken(t)
= [tex]\frac{mgh}{t}[/tex]
= [tex]\frac{(74.7)(9.8)(19.9)}{12.5}[/tex]
= 1165.44 W
b) Let the Power expended by his body be P'
We have (0.412)P' = P
⇒ P' = [tex]\frac{P}{0.412}[/tex] = ([tex]\frac{1165.44}{0.412}[/tex]) = 2828.74 W
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