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Two blocks A and B of mass m and 2m res...

Two blocks A and B of mass m and `2m` respectively are connected by a light spring of force constant k. They are placed on a smooth horizontal surface. Spring is stretched by a length x and then released. Find the relative velocity of the blocks when the spring comes to its natural length

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The correct Answer is:
`v_(r)=sqrt((3k)/(2m))x`
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