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The speed of a particle moving in a circle of radius `r=2m` varies witht time `t` as `v=t^(2)`, where `t` is in second and `v` in `m//s`. Find the radial, tangential and net acceleration at `t=2s`.

A

`sqrt(80) ms ^(-2)`

B

`sqrt(90) ms ^(-2)`

C

`sqrt(120) ms ^(-2)`

D

`sqrt(70) ms ^(-2)`

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The correct Answer is:
A
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