A MACHINE HAS A VELOCITY RATIO OF 5 HAS AN EFFICIENCY OF 40.WHAT EFFORT WOULD BE NEEDED TO LIFT A LOAD OF 100N?

M.A. = V.R. * Efficiency

M.A. = 5 * 40 / 100
M.A. = 2

Effort = Load / M.A.
Effort = 100 N / 2
Effort = 50 N