Question

who develops more power,an 80kg man who walks up a height of 20 steps each 17.5cm high in 7second or one who pushes an 80kg box up a frictionless slope to a height of 5m in 10seconds? Give a reason for your answer

Answer 1

powerman=mgh/time=80g*20*.175/7
powerbox=80*g*5/10

which is greater?