Question

A block has been placed on an inclined plane. The slope angle $\theta$ of the plane is such that the block slides down the plane at a constant speed. The coefficient of kinetic friction is equal to

• A. $\sin \theta$
• B. $\cos \theta$
• C. $g$
• D. $\tan \theta$

Answer 1

The correct option is D $\tan \theta$

When the block slides down the plane with a constant speed , then the inclination of plane is equal to the angle of response($\theta$)

Co-efficient of friction = tan of the angle response = tan$\theta$