How fast a disk is rotating??? Please help me Im trying to attempt this problem, its not a assigned hw problem but it has 2 stars beside it(which means its one of the harder ones) in the book so Im trying to solve it but i don't even know how to begin and have a crack at it. I really could use some help. Thank you everyone who can chime in! A pizza chef tosses a spinning ball of dough into the air. The ball of dough may be considered a solid sphere(mass uniformly distributed throughout its volume) with a radius of 5.80 cm, a density of 1100 kg/m3, and it is initially spinning around an axis of rotation passing through its center at rate of 113 rad/s. When the chef catches it, the dough has stretched out into a disk 18 cm in radius with a uniform thickness. The disk continues to rotate around an axis passing through its center and perpendicular to the plane of the disk. How fast is the disk rotating just before the chef catches it?