Two blocks $A$ and $B$ of mass $m$ and $2\, m$ respectively are connected by a massless spring of force constant $k$. They are placed on a smooth horizontal plane. 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 :-
Two blocks $A$ and $B$ of mass $m$ and $2\, m$ respectively are connected by a massless spring of force constant $k$. They are placed on a smooth horizontal plane. 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
$x\sqrt{\frac{3k}{2m}}$
- B
$x\sqrt{\frac{2k}{3m}}$
- C
$x\sqrt{\frac{2k}{m}}$
- D
$x\sqrt{\frac{3k}{m}}$
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