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OpenStudy (anonymous):
If the work done by a lever is 5675 J, and the work done by the effort force is 10 000 J, what is the efficiency of the machine?
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OpenStudy (mathmate):
Hint: efficiency = (useful work) / (work input)
OpenStudy (anonymous):
Efficiency is equal to: (output work = work done by lever) / (input work = work done by effort)
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