A Potter's Wheel (Assuming a Uniform Disk of Mass 5

Multiple Choice

A potter's wheel (assuming a uniform disk of mass 5.0 kg and diameter 0.50 m) rotates around a vertical axis through its center at a frequency of 10 rad/s. The potter throws a 4.0-kg chunk of clay, shaped as a flat disk of radius 6.0 cm, onto the center of the rotating wheel. The frequency of rotation of the wheel after the clay sticks to it is

A) 8.4 rad/s.
B) 9.6 rad/s.
C) 10 rad/s.
D) 12 rad/s.
E) 19 rad/s.