Question

An object placed on an inclined plane starts sliding when the angle of incline becomes $30^{\circ}$. The coefficient of static friction between the object and the plane is

• A. $\frac{1}{\sqrt{3}}$
• B. $\sqrt{3}$
• C. $\frac{1}{2}$
• D. $\frac{\sqrt{3}}{2}$

Answer 1

Answer: (A)

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

Answer 2

Coefficient of static friction
$\mu_{S}=\tan \theta=\tan \left(30^{\circ}\right)=\frac{1}{\sqrt{3}}$