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2 years ago

5

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 mechanic

al efficiency of the lever?
A.90%
B.30%
C.80%
D.10%

1 answer:

solong [7]2 years ago

5 0

Answer:C

Explanation: 40 divided by 50 is .80
Equaling 80%

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