Physics

Problem

A block of mass

M

slides down on a rough inclined plane with constant velocity. The angle made by the incline plane with horizontal is

\theta

. The magnitude of the contact force will be: (1)

Mg

(2)

Mg \cos \theta

(3)

\sqrt{Mg \sin \theta + Mg \cos \theta}

(4)

Mg \sin \theta \sqrt{1 + \mu}