When a compact disk with a 12.0-cm diameter is rotating at 34.6
rad/s, what are (a) the linear speed and (b) the centripetal
acceleration of a point on its outer rim? (c) Consider a point on
the CD that is halfway between its center and its outer rim.
Without repeating all of the calculations required for parts (a)
and (b), determine the linear speed and the centripetal
acceleration of this point.