JAMB - Physics (2018 - No. 41)
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?
36.0
7.2
5.0
3.6
คำอธิบาย
Mechanical Advantage = V.R × Efficiency
= 5 × 0.72
= 3.6