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A particle is moving in a straight line and passes through a point O with a velocity of `6ms^(-1)` The particle moves with a constant retardation of `2ms^(-2)` for 4 s and there after moves with constant velocity. How long after leaving O does the particle return to O

A

`sqrt(2t)`

B

`(2+sqrt(2))t`

C

`(t)/(sqrt(2))`

D

Can not perdicted unless accelerationis given

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The correct Answer is:
B
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