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A student sits on a rotating stool holding two 2.0 kg masses. When his arms are extended horizontally, the masses are 1 m from the axis of rotation, and he rotates with an angular speed of 0.75 rad/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 the masses horizontally to 0.30 m from the rotation axis.

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