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Physics, 27.11.2020 03:40 mcguirefam7071p2mbzz

A boy pushes a lever down 2 meters with a force of 75 newtons. The box at the other end with a weight of 50 newtons moves up 2.5 meters. a. Calculate the work input by the boy

Winput = Fd

b. Calculate the work output on the box

Woutput = Fd

c. Calculate the percentage efficiency of the lever.

Efficiency = (Woutput/Winput)100%

NOTE: Show your solutions

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