you are stood on top of a very tall building,and you are stood right on the edge of the building and you kick a ball up in to the air.the max height the ball reaches in 30m now the ball starts to travel backtowards the top of the building to the original point of projection and the speed of the ball is 17.3^-2 now just say you did not catch the ball and it travelled past the original point of projection now travelling down the side of the building hence calculate the terminal speed of the ball if it could continue to fall indefinitly beyond the original point of projection any one help here thanks .