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A point P moves in counter-clockwise dir...

A point P moves in counter-clockwise direction on a circular path as shown in the figure. The movement of P is such that it sweeps out a length `s=t^(3)+5`, where s is in meters and t is in seconds. The radius of the path is 20 m. The acceleration of P when t = 2 s is nearly

A

`14 m/s^2`

B

`13 m/s^2`

C

`12 m/s^2`

D

`7.2 m/s^2`

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