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A cubical block of side a is moving with...

A cubical block of side a is moving with velocity V on a horizontal smooth plane as shown in Figure. It hits a ridge at point O. The angular speed of the block after it hits O is

A

`(3v)/(4a)`

B

`(3v)/(2a)`

C

`sqrt(3/2)a`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
A
Conserving angular momentum about `O` (just before and just after ) is
`mva/2=[(ma^(2))/6 (ma^(2))/2]omegaimplies omega=(3v)/(4a)`
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