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Blocks P and R starts from rest and move...

Blocks P and R starts from rest and moves to the right with acceleration `a_(p) = 12t m//s^(2) and a_(R) = 3 m//s^(2)`. Here t is in seconds . The time when block Q 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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