Question

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.

Answer 1

Answer: 94% efficiency

Explanation:

The equation needed:

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

1. 75N = Output | 80N = Input
2. (75)/(80) = 0.9375
3. Simplify = 0.94
4. Convert to Percentage 0.94 = 94% (Move two decimals to the right)