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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.

The change in angular momentum of the solid ball (mass `m`, radius `R`), about the corner point of floor and wall, due to the collision is

A

`2mvR`

B

`mvR`

C

`mvR//2`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
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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