Question

You and a friend move a grand piano across the living room, exerting 25 newtons of force and performing 175 joules of work. It takes you 14 seconds. How far did you move the piano? How much power did you generate, in watts (joules/sec)?

Answer 1

work = force * distance

175 J = 25N * d

d = 7 meters ◄

power = work / time

P = 175J / 14s = 12.5 W ◄