Schultz9029 Schultz9029

22-02-2024
Physics

contestada

A worker uses a pulley to lift a bale of hay from the truck into a barn. If she expends 390 J of energy and 358 J left the box, what is the pulley's efficiency?
a. 8.21%
b. 91.79%
c. 13.41%
d. 86.59%

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