A 2.00 kg , horizontal, uniform tray is attached to a vertical ideal spring of force constant 180 n/m and a 260 g metal ball is in the tray. the spring is below the tray, so it can oscillate up-and-down. the tray is then pushed down 17.9 cm below its equilibrium point (call this point a ) and released from rest.
How high above point A will the tray be when the metal ball leaves the tray?