A block and tackle pulley arrangement has 6 pulleys in wh...
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
80.0%
76.6%
66.7%
60.7%
Correct answer is C
Efficiency = maV.R x 1001
V.R = number of pulleys = 6
ma = LoadEffort = 20050 = 4
Efficiency = 46 × 100 = 66.67%
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