A block and tackle system of 5 pulleys is capable of raising load of 300N vertically upward when an effort of 75 N is applied to it downward. Calculate the efficiency of the system
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Expert's answer
2019-02-14T10:28:37-0500
Calculate the mechanical advantage: it equals load over effort:
"MA=L\/E=300\/75=4."
Calculate the velocity ratio: it equals to the number of pulleys:
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