What is the power of an athlete weighing 960 N that runs through a flight of stair case in 2 mins? There are 100 stairs and each stair case has a length of 100 mm
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The way to approach this sort of problem is through the definition of power … it is the rate that energy is expended or used.
So how much energy was used getting 600N of weight to the top of the stairs? How long did it take?
Aside: the body is not 100% eficient… some energy went to other things like accelerating and decelerating, and heating the body, sweating/panting etc. The question is only asking you to consider the power output that went into changing height.
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