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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//^(2).` The rate of change of speed at this moment is
`(a) 4.m//s^(2)`
`(b) 2,m//s^(2)`
`(c) sqrt3.m//s^(2)`
`(d) sqrt5 .m//s^(2)`

A

`4m//s^(2)`

B

`2m//s^(2)`

C

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

D

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

Text Solution

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The correct Answer is:
B
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