lunaballo273 lunaballo273

21-11-2022
Physics

contestada

A motor winches a 450.0 kg load of gravel for 15.0s at a constant speed of 0.400 m/s
straight up vertically. How much work has the motor done on the box?
I
A) How much energy did the motor use in (a) if it is only 85% efficient

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