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
- 40√3N
- 60N
-
120N
- 200N
- 240N
The correct answer is: C
Explanation
E = M.A/V.R ; 50/100 = M.A/2M.A = 1; L/E = 1
E = L = 120N