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A particle is moving in a straight line and passes through a point O with a velocity of `10ms^(-1)`. The particle moves with a constannt retardation of `5ms^(-2)` for 3 s and there after moves with constant velocity. How long after leaving O does the particle return to O:-

A

`3s`

B

8s

C

Never

D

4.5s

Text Solution

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The correct Answer is:
D
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