samantharowanbrown samantharowanbrown

01-12-2022
Physics

contestada

you pull up a 75 N bucket using a fixed pulley. the rope does not stretch, so the effort and resistance are the same. however you must exert an 80 N force because of friction. find the efficiency.

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kookshin74 kookshin74

01-12-2022

Answer: 94% efficiency

Explanation:

The equation needed:

Efficiency = Energy Output/Energy Input | (Eo)/(Ei)

75N = Output | 80N = Input
(75)/(80) = 0.9375
Simplify = 0.94
Convert to Percentage 0.94 = 94% (Move two decimals to the right)

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