Question

Calculate the effort arm (in cm) of a lever in which the mechanical advantage is $4$ and the load arm is $90\text{cm}$.

• A. 360

Answer 1

The correct option is A 360
Given,
Mechanical advantage = 4
Load arm = 90 cm

We know that,
Mechanical advantage ($M.A$) $=\frac{\text{Effort arm}}{\text{Load arm}}$

$\Rightarrow$ Effort arm $=M.A$ $\times$ Load arm
$=4\times 90$
$=360cm$