What is the power output in unit of Watts for a 69-kg woman who runs up...
What is the power output in unit of Watts for a 69-kg woman who runs up a 49 m high flight of stairs in 10.6 s, starting from vi=1.6 m/s but having a final speed of vf=7.1 m/? Use g=10 m/s.
Homework Answers
We known that power is given by:
P = Increase in Total energy /time
= [ mgh + 0.5mvf^2- 0.5mvi^2]/t where symbols have usual meanings.
= [69*10*49+0.5*69*7.1^2-0.5*69*1.6^2]/10.6
= 3345 W answer
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