A student sits on a freely rotating stool holding two dumbbells, each of mass 3.06 kg (see figure below). When his arms

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A Student Sits On A Freely Rotating Stool Holding Two Dumbbells Each Of Mass 3 06 Kg See Figure Below When His Arms 1 (23.77 KiB) Viewed 44 times

A student sits on a freely rotating stool holding two dumbbells, each of mass 3.06 kg (see figure below). When his arms are extended horizontally (Figure a), the dumbbells are 0.96 m from the axis of rotation and the student rotates with an angular speed of 0.754 rad/s. The moment of inertia of the student plus stool is 2.68 kg - m² and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position 0.308 m from the rotation axis (Figure b). W₂ (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 =