A thin ring of mass 2kg and radius 0.5 m is rolling without on a horizontal plane with velocity 1m/s. A small ball of mass 0.1kg, moving with velocity 20 m/s in the opposite direction hits the ring at a height of 0.75m and goes vertically up with velocity 10m/s. Immediately after the collision

Options

A. the ring has pure rotation about its stationary
B. the ring comes to a complete stop
C. friction between the ring and the ground is to the left
D. there is no friction between the ring and the ground

Answer

C

Explanation

Friction force on the ring