A pulley system has three pulleys in the fixed block and two in the movable block and if the pulley has an efficiency of 72%, the mechanical advantage of the system is?
A
36.0
B
7.2
C
5.0
D
3.6
Verified Correct Answer: D.
Physical Principles & Numerical Solution
Mechanical Advantage = V.R \times Efficiency
= 5 \times 0.72
= 3.6
Source: Myschool Past Questions Archive (Record #47679)