A student sits on a rotating stool holding two 3.0 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·m2 and is assumed to be constant. The student then pulls the objects horizontally to 0.50 m from the rotation axis.

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A student sits on a freely rotating stool holding two dumbbells, each of mass 3.00 kg. When his arms are extended horizontally, the dumbbells are 1.00 m from the axis of rotation and the student rotates with an angular speed of 0.750 rad/s. The moment of inertia of the student plus stool is 3.00 kg · m² and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position of 0.300 m from the rotation axis. (a) Find the new angular speed of the student. (b) Find the kinetic energy of the rotating system before and after he pulls the dumbbells inward.

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

(a) Find the new angular speed of the student.
_______ rad/s

(b) Find the kinetic energy of the student system before and afterthe objects are pulled in.
before _______ J
after _______ J

I am really having trouble with the setup of this problem andhaven't been able to calculate the right answer. I need helpfiguring out how I should approach this. It would really help tosee the problem worked out to have something to compare my workwith so I can see where I'm making my mistakes. Thank you!

A student sits freely rotating stool holding two dumbbells, each of mass . When his arms are extended horizontally, the dumbbells are from the axis of rotation and the student rotates with an angular speed of . The moment of inertia of the student plus stool is and is assumed to be constant. The student pulls the dumbbells inward horizontally to a position from the position rotation axis. (a) Find the new angular speed of the student. (b) Find the kinetic energy of the rotating system before and after he pulls the dumbbells inward.

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