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A particle is moving with a constant acc...

A particle is moving with a constant acceleration `vec(a) = hat(i) - 2 hat(j) m//s^(2)` and instantaneous velocity `vec(v) = hat(i) + 2 hat(j) + 2 hat(k) m//s` then rate of change of speed of particle 1 second after this instant will be :

A

`sqrt(5) m//s^(2)`

B

`sqrt(3) m//s^(2)`

C

`sqrt(10) m//s^(2)`

D

None of these

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The correct Answer is:
A
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