A machine of efficiency 80% is used to lift a box. If the...
A machine of efficiency 80% is used to lift a box. If the effort applied by the machine is twice the weight of the box. Calculate the velocity ratio of the machine
0.50
0.63
0.80
1.60
Correct answer is B
Y = M.AV.R×1001
= 12V.R×1001
V.R = 0.625
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