I'm kinda having trouble figuring out this problem... i was thinking of doing a system of equations to relate the present angular and new angular speed but that didn't really get me anywhere because i wasn't really including all the variables in the problem... that and i couldn't simplify it down to one variable to solve for. If anyone could help me out i'd appreciate it a lot.(adsbygoogle = window.adsbygoogle || []).push({});

A student sits on a freely rotating stool holding two weights, each of mass 2.92 kg. When his arms are extended horizontally, the weights are 1.09 m from the axis of rotation and he rotates with an angular speed of 0.746 rad/s.

The moment of inertia of the student plus stool is 2.92 kg · m2 and is assumed to be constant. The student pulls the weights in horizontally to a position 0.307 m from the rotation axis.

Question: Find the new angular speed and find the kinetic energy before and after he pulls the weight inward.

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# Problem with old and New angular speed help me please

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