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OpenStudy (anonymous):
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% I know the formula to find the answer But I dont know how to use it AMA/IMAx100 But How do I find the IMA and AMA in this situation?
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OpenStudy (anonymous):
Three supporting strings without friction should have given M.A. of 3. Since they gave only 2, the efficiency is 2/3 = 66%
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