Maximum Efficiency:
From Eq, the expression of mechanical advantage is given by:
M. A. = W/P= (1 /m)(1- (C /P))
Efficiency = MA/ VR = 1/ (m × VR)
Efficiency of machine will be (C/P) is negligible or effort is extremely maximum when large. Thus,
Maximum efficiency, (η) max =1 /(m × VR)