Question

A person of mass 70kg runs up a flight of stairs with a vertical 5m.If the trip takes 7s to complete,calculate the persons power.

Answer 1

power =? , Work done (WD) =? , mass (m) = 70g , Gravity (g) = 10 m/s² , height (h) = 5m , time = 7s

`WD=Ep = mgh \\ = 70 * 10 * 5 \\ = 3500J \\ \\ \\ power = (work \: done)/(time) = (3500)/(7) \\ \\ power = 500 \: w`

I hope I helped you^_^