Question

Think about a nutcracker. And observe the given figure and calculate the resistance (R) offered by the nut when the effort of 45 N is applied.

• A. 140 N
• B. 135 N
• C. 120 N
• D. 160 N

Answer 1

The correct option is B

135 N

From the given figure,

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