A body of mass 7.5 kg is to be pulled up along a plane which is inclined at 30o to the horizontal. If the efficiency of the plane is 75%, what is the minimum force required to pull the body up the plane?
(g = 10ms-1)
- 5.0 N
- 20.0 N
-
50.0 N
- 75.0 N
- 200.0 N