Question

Calculate the effort arm of a lever in which the mechanical advantage is $4$ and the load arm is $90cm$.

• A. $80cm$
• B. $140cm$
• C. $360cm$
• D. $150cm$

Answer 1

The correct option is C

$360cm$

Given,
Mechanical advantage = 4
Load arm = 90 cm
Mechanical advantage $=\frac{\text{Effort arm}}{\text{Load arm}}$
Effort arm = Mechanical advantage $\times$ load arm $=4\times 90=360cm$