A disc made of wood rotates the water through an axis perpendicular to the disc and passing through the center of the disc. the radius of the disk is 0.600 m and the mass is 1.60 Kg. it starts at rest. a ball of mass 0.0200 kg freezes and moves towards the disk along a horizontal line perpendicular to the radius of the disk. the ball hits the edge of the disk and becomes stuck at a point on the disk 0.600 m from the center. after the ball hits the disk rotates at 4.00 rad s. what was the speed of the bullet before it hit the disk?