A child stands on the edge of a frictionless disk, if he drops the rock he holds in his hand what will happen to the child's angular velocity?
Nothing at all will happen to his angular velocity. If we are to assume that something was to happen to his angular velocity then he would experience an angular acceleration of some sort; Which isn't the case.
Angular concepts can seem radically different, compared with linear dynamics, but the fundamentals still hold true. Linear kinematics take into consideration acceleration, position, time, velocity, speed, etc. The kinematic relations apply to everything contained in our universe. In a general way kinematics loosely relates space with time and vise verse.
(Dr., Gerace. "Assessing to learn." 01 01 2009 64. Web.11 Apr 2009.
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