Question

In a third class of lever, load arm is $10cm$ and effort is given at a distance $500cm$ away from the load on the opposite side of the fulcrum. So, the mechanical advantage is

• A. $M.A.=\frac{10}{51}$
• B. $M.A.=\frac{1}{58}$
• C. $M.A.=\frac{2}{51}$
• D. $M.A.=\frac{1}{51}$

Answer 1

The correct option is D $M.A.=\frac{1}{51}$

$FA=\text{Effort Arm = 10 cm}$
Load Arm $=FA+AB=10+500=510cm$
Mechanical Advantage $=\frac{\text{Effort Arm}}{\text{Load Arm}}=\frac{10}{510}=\frac{1}{51}$