A student sits on a rotating stool holding two 30 kg, Physics

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A student sits on a rotating stool holding two 30 kg

A student sits on a rotating stool holding two 3.0 kg objects. When his arms are extendedhorizontally, the objects are 1.0 m from the axis of rotation, andhe rotates with an angular speed of 0.75 rad/s. The moment ofinertia of the student plus stool is 3.0 kg·m2and is assumed to be constant. The student then pulls the objectshorizontally to 0.20 m from the rotationaxis.

(a) Find the new angular speed of the student

(b) Find the kinetic energy of the student before and after theobjects are pulled in.

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