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
`13m//s^(2)`
B
`12m//s^(2)`
C
`7.2m//s^(2)`
D
`14m//s^(2)`
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The correct Answer is:
D
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