Question

Which requires more power? lifting a 25 kg bag of cement 10 m vertically in 1 minute, or lifting a 50 kg bag 5?

Answer 1

P = F*d/t = mg*d/t = (25*9.8) * 10/60 =
40.83 J/s.

P = 50*9.8 * 5/60 = 40.83 J/s.

Both require the same power.