A rectangular aluminum plate of width 27.3 cm, length 35.2 cm, and thickness 1.05 cm is rotating about its center at 33.5 radians per second. A solid cylinder of copper of diameter 9.35 cm and height 5.12 cm is dropped onto the center of the rotating plate. Note : Aluminum has a density of 2700 kg/m3 $4.20 Copper has a density of 8890 kg/m3 What is the mass of the rectangular plate? As the bell swings, how long does for the ball to reach back to join What is the mass of the copper cylinder? What is the final rotational speed of the system