A student sits on a rotating stool holding two 5 kg objects. When his arms are extended horizontally, the objects are 0.7 m from the axis of rotation, and he rotates with angular speed of 0.73 rad/sec. The moment of iner- tia of the student plus the stool is 4 kg m? and is assumed to be constant. The student then pulls the objects horizontally to a radius 0.34 m from the rotation axis. 30 0 D. I (a) (b) Calculate the final angular speed of the student. Answer in units of rad/s. part 2 of 2 Calculate the change in kinetic energy of the system. Answer in units of J.
