A plane inclined at 30o to the horizontal has an efficiency of 50%. Calculate the force parallel to the plane required to push a load of 120N uniformly on the plane

A. 50.0N
B. 120.0N
C. 200.0N
D. 240N

Correct Answer: Option B

B. 120.0N

Explanation

V.R = 1/sinθ=1/sin30 = 2

M.A = (E×V.R)/100=(50×2)/100 =1

Effort = load/M.A =120/1 =120N