Question

Think about a nutcracker. And observe the given figure and calculate the resistance $\left(\text{R}\right)$ offered by the nut when the effort of $45\text{N}$ is applied.

• A. $135\text{N}$
• B. $160\text{N}$
• C. $120\text{N}$
• D. $140\text{N}$

Answer 1

The correct option is A $135\text{N}$

From the given figure,

Load arm $=12\text{cm}$ and effort arm $=(12+24)\text{cm}=36\text{cm}$
$\therefore$ According to the principle of moment,
Load $\times$ Load arm = Effort $\times$ Effort arm
or $\text{R}\times 12=45\times 36$
or $\text{R}=\frac{45\times 36}{12}=135\text{N}$