Question

A block has been placed on an inclined plane with the slope angle θ, block slides down the plant at a constant speed. The coefficient of kinetic energy is equal to ____________

(a) sinθ

(b) cosθ

(c) g

(d) tanθ

This question was posed to me by my school principal while I was bunking the class.

Question is taken from Acceleration topic in portion Laws of Motion of Engineering Physics I

Answer 1

Correct option is (d) tanθ

To explain I would say: As the block slides down the inclined plane with a constant speed, the angle of inclination is equal to the angle of response.

μ = tangent of the angle of response

μ = tanθ.