A student sits on a rotating stool holding two 2.6-kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s. The moment of inertia of the student plus stool is 3.0 kg*m^2 and is assumed to be constant. The student then pulls in the objects horizontally to 0.29 m from the rotation axis. Calculate the final angular speed of the student and calculate the change in kinetic energy of the system.
a) Final angular speed: ___ rad/s, Change in kinetic energy: ___ J
