A student sits on a rotating stool holding two 22-kg, Physics

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A student sits on a rotating stool holding two 22-kg

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Question: A student sits on a rotating stool holding two 2.2-kg objects. When his arms are extended horizontally, the objects are 1.0 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 Â•m² and is assumed to be constant. The student then pulls in the objects horizontally to 0.28 m from the rotation axis.

Part I: Find the new angular speed of the student.

rad/s

Part II: Find the kinetic energy of the student before and after the objects are pulled in.

before J

after J

If possible just a brief explanation how you got the answer?

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Physics: A student sits on a rotating stool holding two 22-kg

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