A ball of mass 2 kg is attached with a massless spring of spring constant k=30.4N/m which is initially compressed by 1m and suddenly spring is released and ball is detached from spring after that ball fell on the top point 'P' of fixed curved track.(assume no velocity loss after colliding with the surface of track). The ball starts slipping on the track from a point 'P' 15 m above the horizontal surface joined to a rough horizontal surface (as shown in figure). The rough surface from 'H' to 'A' has a friction coefficient of 0.49 with the ball. From point 'A' the ball started climbing on the smooth circular loop of radius 
6.55 m. When ball reached the top point 'S' of circular loop it looses the contact with the loop then find when particle will hit the ground?[take g=9.8m/]
