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A particle is moving in xy-plane .At cer...

A particle is moving in xy-plane .At certain instant the components of its velocity and acceleration are as follows `u_(x) = 3m//s,u_(y)=4m//s,a_(x)=2m//s^(2)"and"a_(y)=1m//s^(2).` The rate of change of speed at this moment is

A

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

B

`4 m//s^(2)`

C

`10 m//s^(2)`

D

`2 m//s^(2)`

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The correct Answer is:
D
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