# A solid sphere rolls without slipping on a rough horizontal floor, moving with a speed . It makes an elastic collision with a smooth vertical wall. After impact a) It will move with a speed initially b) Its motion will be rolling without slipping c) Its motion will be rolling without slipping initially and its rotational motion will stop momentarily at some instant d) Its motion will be rolling without slipping only after some time

## Question ID - 100600 :- A solid sphere rolls without slipping on a rough horizontal floor, moving with a speed . It makes an elastic collision with a smooth vertical wall. After impact a) It will move with a speed initially b) Its motion will be rolling without slipping c) Its motion will be rolling without slipping initially and its rotational motion will stop momentarily at some instant d) Its motion will be rolling without slipping only after some time

3537

(a,c,d)

After impact, the force of friction will act in a direction opposite to that of the motion. The body will retain its initial angular motion (clockwise). The force of friction will cause linear retardation, reducing  It will also cause an anticlockwise angular acceleration, which will reduce  to zero and then introduce anticlockwise  till rolling without slipping begins.  will then disappear

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

 a) The ring has pure rotation about its stationary b) The ring comes to a complete stop c) Friction between the ring the ground is to the left d) There is no friction between the ring and the ground