A student sits on a freely rotating stool holding two dumbbells, each of mass 2.93 kg (see gure below). when his arms are extended horizontally (Figure a), the dumbbells are 1.07 m from the axis of rotation and the student rotates with an angular speed of 0.740 rad/s. The moment of inertia of the student plus stool is 2.73 kg - m2 and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.304 m from the rotation axis (Figure b). \"'i ;| 3 \"'1 a In G) (a) Find the new angular speed of the student. 1.78 x The words 'freely rotating stool' mean that there are no external torques applied. What is conserved in this case? rad/s (b) Find the kinetic energy of the rotating system before and after he pulls the dumbbells inward. Kbefore = J Kafter = J Need Help