A solid disk of mass =0. 800 kg and radius =0. 250 m is suspended vertically and is free to rotate about its center without friction. A point object that has the same mass as the disk is placed at an angle thetai=30. 0â clockwise from the top along the rim, causing the disk to rotate. The acceleration due to gravity is =9. 80 m/s2. What is the angular speed f of the disk when the object is directly below the center of the disk.