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Physics, 02.12.2020 15:30 babygirl6571

A machine of efficiency of 70% is used to raise
a body of
mass 80 kg through
a vertical distance of 3m in
40 seconds. Calculate the power input. (Take g = 10 m/s²)

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A machine of efficiency of 70% is used to raise
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mass 80 kg through
a verti...

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