A man weighing 700N runs up a flight of 15 steps, each 20cm high, in 5 seconds. Calculate the power of the man.
Total height covered = 15 x 20cm = 300cm = 3m
work done = Force x distance = 700N x 3m = 2100J
Since time taken is 5s, the power of the man is power = (2100/5)Js-1 = 420W.
