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A particle 'p' moves along a straight li...

A particle 'p' moves along a straight line away from a point 'O' obeying the relation S = 16 + 48t - `t^(3)`. The direction of 'P' after t = 4 is

A

`vec(OP)`

B

`vec(PO)`

C

Rest at the instant

D

Perpendicular to `vec(OP)`.

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The correct Answer is:
B
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