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in Physics by (51.1k points)

A solid sphere rolls without slipping on a rough horizontal floor, moving with a speed v. It makes an elastic collision with a smooth vertical wall. After impact, 

(a) it will move with a speed v initially 

(b) its motion will be rolling without slipping 

(c) its motion will be rolling with slipping initially and its rotational motion will stop momentarily at some instant 

(d) its motion will be rolling without slipping only after some time

1 Answer

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by (50.3k points)
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Best answer

Correct Answer is: (a, c, & d)

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

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