38. From a building two balls A and B are thrown such that A is thrown upwards A and B downwards (both vertically). If vA and vB are their respective velocities on reaching the ground, then the relation b/w Va and Vb ..?

As the ball moves down from height ‘h’ to ground the P.E at height ‘h’ is converted to K.E. at theground (Applying Law of conservation of Energy).        

As the ball moves down from height ‘h’ to ground the P.E at height ‘h’ is converted to K.E. at the
ground (Applying Law of conservation of Energy)

therefore Va=Vb

                   . '' .Va = Vb

Va=Vb