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A 20kg mass is pulled up a slope inclined at 30degree to the horizontal. If...

A 20kg mass is pulled up a slope inclined at 30degree to the horizontal. If the efficiency of the plane is 75%,the force required to pull the load up the plane is? A.13.3N B.73.5N C.133.3N D.533.2N[g=10ms-2]?
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Asked by Marvelab on 28th April, 2016
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