If the escalator in Problem is not moving, determine the constant speed at which a man h...

If the escalator in Problem is not moving, determine the constant speed at which a man having a mass of 80 kg must walk up the steps to generate 100 W of power-the same amount that is needed to power a standard light bulb.

Problem:

To dramatize the loss of energy in an automobile, consider a car having a weight of 5000 lb that is traveling at 35 mi/h. If the car is brought to a stop, determine how long a 100-W light bulb must burn to expend the same amount of energy. (1 mi = 5280 ft.)