Question

When the effort arm is greater than the load arm then mechanical advantage is greater than one.

• A. True
• B. False

Answer 1

The correct option is A

True

Mechanical advantage is defined as ratio of load (L) raised to the effort (E) applied i.e.,
Mechanical advantage (MA) = $\frac{\text{Load (L)}}{\text{Effort (E)}}$ .....(i)

Also by principle of machines,
Effort x Effort arm = Load x Load arm
$\Rightarrow$ $\frac{\text{Load}}{\text{Effort}}=\frac{\text{Effort arm}}{\text{Load arm}}$ ..(ii)

From equation (i) and (ii),
Mechanical Advantage = $\frac{\text{Effort arm}}{\text{Load arm}}$

When effort arm > load arm, then $\frac{\text{Effort arm}}{\text{Load arm}}$ > 1
So, mechanical advantage > 1

Hence, the given statement is true.