Question

pulley system of velocity ratio 4. Calculate its mechanical
advantage if its efficiency is 90%.

Answer 1

efficiency = MA/VR

90/100 = MA/4

0.9 = MA/4

3.6 = MA

mechanical advantage = 3.6

Answer 2

M.A=V.R*efficiency
Given
V. R=4
Efficiency =90%

M.A=4*90/100
=4*0.9
=3.6