A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N…

A block and tackle pulley arrangement has 6 pulleys in which an effort of 50N supports a load of 200N, calculate the efficiency of the machine

Correct Answer: Option C

Explanation

Efficiency = (frac{ma}{V.R}) x (frac{100}{1})
V.R = number of pulleys = 6
ma = (frac{text{Load}}{text{Effort}}) = (frac{200}{50}) = 4
Effiecieny = (frac{4}{6}) × 100 = 66.67%

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