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A point p moves in counter - clockwise ...

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 in the figure . The movement of 'p' is such that it sweeps out a length `s = t^(3) + 5 ` , where `s` is in metres and ` t` is in seconds . The radius of the path is `20 m` . The acceleration of 'P' when ` t = 2 s` is nearly .

A

`14m//s^(2)`

B

`13m/s^(2)`

C

`12m//s^(2)`

D

`7.2m//s^(2)`

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The correct Answer is:
A
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