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22-07-2021
Mathematics

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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%

Respuesta :

22-07-2021

Answer:C

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

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