Question

The mechanical advantage of a simple machine is given by the ratio of

• A. load to effort
• B. load arm to effort arm
• C. effort to load
• D. none of these

Answer 1

The correct option is A

load to effort

Explanation for correct option:

Option (A): Load to an effort

1. Mechanical advantage of a simple machine is the ratio of the load overcome to the effort applied.
2. $Mechanicaladvantage=\frac{Load}{Effort}$
3. Lever: It is a simple machine consisting of a rod that is free to move about a fixed point. This fixed point is called the fulcrum.
4. Various parts of the lever are load, effort, fulcrum, effort arm, and load arm.
5. According to the principle of lever we have,

$$\begin{gathered} Load\times loadarm=Effort\times Effortarm \\ \frac{Load}{Effort}=\frac{Effortarm}{Loadarm} \\ Mechanicaladvantage=\frac{Load}{Effort}=\frac{Effortarm}{Loadarm} \end{gathered}$$

Hence, the right answer is option (A).