Question

A block is at rest on an inclined plane making an angle αwith the horizontal. As the angle αof the incline is increased, the block starts slipping when the angle of inclination becomes θ. The coefficient of static friction between the block and the surface of the inclined plane is or
A body starts sliding down at an angle θto horizontal. Then coefficient of friction is equal to

• A. sinθ
• B. cosθ
• C. tanθ
• D. Independent of θ

Answer 1

The correct option is C

tanθ

Coefficient of friction = Tangent of angle of repose
$\therefore \mu =tan\theta$