Find the work done by a person weighing 133 lb walking exactly one revolution(s) up a circular, spiral staircase of radius 5 ft if the person rises 13 ft after one revolution.

Respuesta :

The work done by a person will be  2341.28 J

Work done is negative of change in potential energy, that is  W=−(∆U). It means that Work done against a force (or work done on a system) increases its potential energy. And Work done by a force (or work done by the system) decreases its potential energy

mass = 60.33kg

height = 3.96 m

work done = change in potential energy

                  = m*g*h

                  = 60.33* 9.8 * 3.96 = 2341.28 J

The work done by a person will be  2341.28 J

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