Mathematics, 22.07.2021 02:20 herchellann302
Tim used a lever to lift a heavy box off the ground. His input work was 50 J and the output work was 40 J. What was the mechanical efficiency of the lever?
A.90%
B.30%
C.80%
D.10%
Answers: 3
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Tim used a lever to lift a heavy box off the ground. His input work was 50 J and the output work was...
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