student sits on a freely rotating stool holding two dumbbells, each of mass 3.02 kg (see figure below). When hls arms are extended horizontally (Figure a), the dumbbells are 0.95 m rom the axis of rotation and the student rotates with an angular speed of 0.749 rad/s. The moment of Inertia of the student plus stool is 2.75 kg · m2 and is assumed to be constant. The cudent pulls the dumbbells Inward horizontally to a position 0.298 m from the rotatlon axis (Figure b). b (a) Find the new angular speed of the student. rad/s (b) Find the kinetic energy of the rotating system before and after he pulls the dumbbells Inward. Kbefore = Kafter =

student sits on a freely rotating stool holding two dumbbells, each of mass 3.02 kg (see figure below). When hls arms are extended horizontally (Figure a), the dumbbells are 0.95 m rom the axis of rotation and the student rotates with an angular speed of 0.749 rad/s. The moment of Inertia of the student plus stool is 2.75 kg · m2 and is assumed to be constant. The cudent pulls the dumbbells Inward horizontally to a position 0.298 m from the rotatlon axis (Figure b). b (a) Find the new angular speed of the student. rad/s (b) Find the kinetic energy of the rotating system before and after he pulls the dumbbells Inward. Kbefore = Kafter =