Question Detail
Question
A block is sitting on an inclined plane. The angle of the incline is slowly increased. At a specific angle θ, the block just begins to slide. This angle θ is related to which quantity?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The angle at which sliding just begins is the angle of repose. At this point, the component of weight down the plane (mg sin θ) equals the maximum static friction (μ_s mg cos θ). Solving gives tan θ = μ_s.
Hint
At the point of slipping, static friction is at its maximum.