Question

An effort of 500 N is applied through 0.50 m on a machine, whose efficiency is 90%, such that resistance is overcome through 0.04 m. Calculate the mechanical advantage.

• A. 10.25
• B. 11.25
• C. 12.25
• D. 15.25

Answer 1

The correct option is B 11.25

Given: effort applied = 500 N, efficiency = 90%, distance moved by effort = 0.50 m and distance moved by load = 0.04 m.
Velocity ratio $=\frac{\text{Distance moved by effort}}{\text{Distance move by load}}$
$=\frac{0.50}{0.04}=12.5$
MA = Efficiency $\times$ Velocity ratio
$=\frac{90}{100}\times 12.5=11.25$