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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 40 J. What was the mechanical efficiency of the lever? A.90% B.30% C.80% D.1…

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.1…
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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 40 J. What was the mechanical efficiency of the lever?

A.90%
B.30%
C.80%
D.10%

asked
User EladG
by
7.9k points

1 Answer

5 votes
Answer:C

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

answered
User Miche
by
8.5k points
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