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5 February, 23:42

The actual mechanical advantage of a pulley is 2. The pulley has 3 supporting strings. What is the efficiency of the pulley?

50%

66%

100%

150%

+2
Answers (1)
  1. 6 February, 00:15
    0
    Efficiency is the ability to avoid wasting energy, materials, money, time, and effort in producing a desired result. We know the formula to find the answer AMA/IMAx100. Three supporting strings should have given M. A. of 3 provided that this is without friction. Since there are only 2, the efficiency is 2/3 = 66%.
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