The moment of inertia of the student plus stool is 309

Reference no: EM13630874

A student sits on a freely rotating stool holding two weights, each of mass 3.09 kg. When his arms are extended horizontally, the weights are 1.08 m from the axis of rotation and he rotates with an angular speed of 0.753 rad/s. The moment of inertia of the student plus stool is 3.09 kg·m² and is assumed to be constant. The student pulls the weights in horizontally to a position 0.302 m from the rotation axis.

(a) Find the new angular speed of the student.

(b) Find the kinetic energy of the student before and after he pulls the weights inward.

Reference no: EM13630874

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