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)
(g = 10ms-1)
-
A.
5.0 N -
B.
20.0 N -
C.
50.0 N -
D.
75.0 N -
E.
200.0 N