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A plane inclined at an angle at 30o to the horizontal has an efficiency of 50%. The ...

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

A. 40√3N
B. 60N
C. 120N
D. 200N
E. 240N




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