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19 August, 16:34

A 600N box is pushed up a ramp that is 2m high and 5m long. the person pushing the box exerts a force of 300N. what is the efficiency of the ramp.

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  1. 19 August, 20:02
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    The gain in potential energy is 600*2 = 1200 J, and this is the minimum required work that would be required in a frictionless situation. The work that actually has to be done is F*X = 300*5 = 1500 J. The efficiency is therefore 1200/1500 = 80%
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