# Answer to Question #74452 in Mechanics | Relativity for chinemere john

Question #74452

how long will it take a 60kg man to climb a height of 22m if he expended energy at the rate of 0.25kw? [g=ms]

Expert's answer

We can find the time that man needs to climb a height of 22 m from the definition of the power:

P=Fv=Fh/t=mgh/t,

t=mgh/P=(60 kg∙10 m/s^2 ∙22 m)/(0.25∙〖10〗^3 W)=52.8 s.

P=Fv=Fh/t=mgh/t,

t=mgh/P=(60 kg∙10 m/s^2 ∙22 m)/(0.25∙〖10〗^3 W)=52.8 s.

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