Question

A block of mass $3kg$ is rest on a rough inclined plane as shown in the figure. The magnitude of net force exerted by the surface on the block will be

• A. 15$\sqrt{3}$
• B. 15 N
• C. 26N
• D. 30N

Answer 1

The correct option is C 26N

We know that force exerted on an inclined plain will be

$F=mg\cos \theta$

$F=3\times 10\times \cos {30}^0$

$F=30\times \sqrt{\frac{3}{2}}$

$F=25.98N$

$F=26N$

Hence,

option $\left(C\right)$ is correct answer.