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

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.
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