Question

The coefficient of friction between a body and an inclined plane is $\frac{1}{\sqrt{3}}$. If the body is just ready to slide down, the angle of inclination is

• A. ${75}^0$
• B. ${60}^0$
• C. ${45}^0$
• D. ${30}^0$

Answer 1

The correct option is D ${30}^0$

$\mu =\frac{1}{\sqrt{3}}$

When body is about to slide down, $gsin\theta =\mu gcos\theta$

$\Rightarrow \theta ={30}^o$