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A ball, rolling purely on a horizontal f...

A ball, rolling purely on a horizontal floor with centre's speed `v`, hits a smooth vertical wall surface elastically. Answer the following questions.

Just after the collision is over, the velocity of the lowest point of the ball is

A

`v`, leftward

B

`2v`, leftward

C

`v`, rightward

D

`2v`, rightward

Text Solution

Verified by Experts

The correct Answer is:
B
Just after collision
`v=omegar`
Velocity of lowest potential `=v+omegar=2v`

Change in angular momentum is due to translational part only, as `omega` does not change due to collision.
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