Homework Help: Physics

Posted by Jacob on Tuesday, April 13, 2010 at 8:24pm.

Wong is standing on a turntable in class holding a weight in each hand a distance .75 meters from the center of his body. He is originally rotating with an angular frequency w=0.3 rad/s. He pulls the weights in so they are only .25 meters from the axis of rotation. The original moment of inertia of wong, the turntable and the weights is I,initial = 8kgm^2. The final moment of inertia of Wong, the turntable and the weights is I,final= 5kgm^2

What is wong's final angular velocity W,final?

As justin pulls the weights in, the total angular momentum of wong, the turntable, and the weights

increases, decreases, or remains the same?

Physics - drwls, Tuesday, April 13, 2010 at 8:42pm
Please show some effort and we will critique your work.

This is clearly an conservation of angular momentum problem.

You are not going to learn anything if yuou expect us to do all the work for you.
Physics - Jacob, Tuesday, April 13, 2010 at 9:55pm
ok formula L=Iw i know I=5kgm^2 and i am finding w. How would i go about finding L give me a hint.

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