A student sits on a rotating stool holding two 2.2-kg objects.When his arms are extended horizontally, the objects are 1.0 m fromthe axis of rotation and he rotates with an angular speed of 0.75rad/s. The moment of inertia of the student plus stool is 3.0 kg ·m2 and is assumed to be constant. The student then pulls in theobjects horizontally to 0.46 m from the rotation axis. (a) Find thenew angular speed of the student. (b) Find the kinetic energy ofthe student before and after the objects are pulled in. beforeafter (c) Where does the energy difference come from/go to?
