A ring of mass `m=1kg` can slide over a smooth vertical rod. A light string attached to the ring passing over a smooth fixed pulley at a distance of `L=0.7m` from the rod as shown in figure.

At the other end of the string mass `M=5kg` is attached, lying over a smooth fixed inclined plane of inclination angle `37^@`. The ring is held in level with the pulley and released. Determine the velocity of ring when the string makes an angle `(alpha=37^@)` with the horizontal. `[sin 37^@=0.6]`