A solid disk of mass M = 0.900 kg and radius R = 0.400 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 0₁; 15.0° clockwise from the top
along the rim, causing the disk to rotate. The acceleration due
to gravity is g = 9.80 m/s².
=
What is the angular speed of of the disk when the object is
directly below the center of the disk.