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Block A and C starts from rest and move ...

Block A and C starts from rest and move to the right with acceleration `a_(A)=12tms^(-2)` and `a_(C )=3ms^(-2)`. Here t is in second. The time when block B again comes to rest is

A

`2s`

B

`1s`

C

`3/2s`

D

`1/2 s`

Text Solution

Verified by Experts

The correct Answer is:
D
Block B will again comes to rest if
`v_(A)=v_(c)` i.e. `3t=(12t)trArr t=.^(1)//_(2) s`
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