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Two blocks A and B of masses m and 2m, r...

Two blocks A and B of masses m and 2m, respectively , are connected by a massless spring of force constant k and are placed on a smooth horizontal plane. The spring is stretched by an amount x and then released . The relative velocity of the blocks when the spring comes to its natural length is

A

`(sqrt((3k)/(2m)))x`

B

`(sqrt((2k)/(3m)))x`

C

`sqrt((2xk)/(m))`

D

`sqrt((3km)/(2x))`

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The correct Answer is:
A
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