a 50kg crate is lifted 10 m?

Question

A) how much potential energy does that have after being lifted
B) it took 5 sec to lift the crate using machine what is the power rating of the machine

Answer 1

Force = mass * acceleration (of gravity, in this case)
Energy = Force * distance
Power = Energy / time

Energy = 50 kg * 9.8 m/s^2 *10 m
Power = that energy / 5 seconds

The math is easy, so you can punch the numbers in your calculator -- or do it on paper.

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