A plane inclined at an angle at 30o to the horizontal has an efficiency of 50%. The force parallel to the plane required to push a load of 120 N uniformly up the plane is
E = \(\frac{\text{M.A}}{\text{V.R}}\) ; \(\frac{50}{100}\) = \(\frac{\text{M.A}}{2}\)
M.A = 1; \(\frac{\text{L}}{\text{E}}\) = 1
E = L = 120N
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