Question

A cubical block rests on an inclined plane of μ = 1/√3, determine the angle of inclination when the block just slides down the inclined plane?

(a) 40°

(b) 50°

(c) 30°

(d) 20°

I got this question during an online exam.

I would like to ask this question from Friction and Forces topic in section Laws of Motion of Engineering Physics I

Answer 1

The correct answer is (c) 30°

The explanation is: When the block just slides down the inclined plane, the angle of inclination is equal to the angle of response.

tan α = μ= 1/√3

α = 30°.