JAMB Physics 2022 Paper

Concept:The force needed to just start sliding equals the limiting friction, which depends on the angle of inclination.Explanation:For an object about to slide on an inclined plane, the coefficient of friction is given by:$$\mu = \tan \theta$$This comes from balancing the weight component down the slope with the maximum static friction.Here, the plane is inclined at $\theta = 30^\circ$.Thus,$$\mu = \tan 30^\circ = \frac{1}{\sqrt{3}}$$Therefore, the coefficient of friction is $\frac{1}{\sqrt{3}}$.Answer:$\frac{1}{\sqrt{3}}$(Option D)