If the escalator in Prob. 14−46 is not moving, determine the constant speed at which a man having a mass M must walk up the steps to generate power P—the same amount that is needed to power a standard light bulb.

Data from problem 46

The escalator steps move with a constant speed v. If the steps are of height h and length l, determine the power of a motor needed to lift an average mass M per step. There are n steps.

Given: M = 80 kg n = 32 V = 0.6 m S h = 125 mm 1 = 250 mm P = 100 W