Question

Mechanical advantage of a lever is given by

• A. $\frac{\mathrm{effort}\mathrm{arm}}{\mathrm{load}\mathrm{arm}}$
• B. $\frac{\mathrm{load}\mathrm{arm}}{\mathrm{effort}\mathrm{arm}}$
• C. load arm x effort arm
• D. load arm + effort arm

Answer 1

The correct option is A

$\frac{\mathrm{effort}\mathrm{arm}}{\mathrm{load}\mathrm{arm}}$

1. Mechanical advantage can be defined as the ratio of load to effort.
2. It is also defined as an effort arm to load arm.
3. Mathematically, we can see that, $\mathrm{Mechanical}\mathrm{advantage}=\frac{\mathrm{load}}{\mathrm{effort}}=\frac{\mathrm{effort}\mathrm{arm}}{\mathrm{load}\mathrm{arm}}$

Hence, option A is correct.