Starting from a height H, a ball slips without friction, down a plane inclined at an angle of `30^(@)` to the horizontal (fig.). After leaving the inclined plane it fall under gravity on a parabolic path and hits the horizontal ground surface. The impact is perfectly elastic (It means that there is no change in horizontal component of ball’s velocity and its vertical velocity component gets inverted. There is no change in speed due to collision). Will the ball rise to a height equal to H or less than H after the impact ?

Answer

less than H