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NEETPhysics-Friction

NEET Physics Inclined Plane MCQ Question

Type: MCQ-numerical-Medium

A block of mass m slides down the plane inclined at angle 30° with an acceleration g/4. The value of coefficient of kinetic friction will be :

A

$\frac{2\sqrt{3} + 1}{2}$

B

$\frac{1}{2\sqrt{3}}$

C

$\frac{\sqrt{3}}{2}$

D

$\frac{2\sqrt{3} - 1}{2}$

Correct Answer

Option B

Detailed Explanation

The net acceleration a = g/4. Using the equation a = g(sinθ - μcosθ), we get μ = (sin30° - a/g) / cos30° = (1/2 - 1/4) / (√3/2) = 1/(2√3).

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