a 60 kg woman runs up a staircase 15 m high (vertically) in 20 s. (a) how much power does she expend? (b) what is her horsepower rating?
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Originally Posted by twistedmexican a 60 kg woman runs up a staircase 15 m high (vertically) in 20 s. (a) how much power does she expend? (b) what is her horsepower rating? Work done is equal to the change in potential energy which is: m*g*h=60*9.81*15=8829 Joules This is done in 20 seconds so the avaerage power is 8829/20 = 441.45 Watts. In horespower this is 441.45*0.00134=0.592 hp. RonL
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