Physics-
General
Easy
Question
Consider a sphere of mass ‘m’ radius ‘R’ doing pure rolling motion on a rough surface having velocity v0 
as shown in the Figure. It makes an elastic impact with the smooth wall and moves back and starts pure rolling after some time again
- Change in angular momentum about ‘O’ in the entire motion equals 2mv0R in magnitude
- Moment of impulse provided by the wall during impact about O equals 2mv0R in magnitude
- Final velocity of ball will be
- Final velocity of ball will be
The correct answer is: Change in angular momentum about ‘O’ in the entire motion equals 2mv0R in magnitude
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