A ring of radius a=1m and having mass 4kg lies on a smooth horizontal surface. One end of each of the two massless spring $k\text{ and 2}k(k=\text{ 24}0\text{ N}/\text{m})$ are fixed to the diametrically opposite points of ring and the other end of the two springs is attached to a block of mass m=1kg, which lies at the centre of the ring and in this position springs are at their natural length.

If the block is displaced by a distance $\frac{a}{2}$ along  the length of springs such that spring of spring constant k is compressed $\frac{a}{2}$  and is released then at the instant when each spring achieves it’s natural length, the velocity of the ring (in m/s) will be