On a frictionless table, a glob of clay of mass 0.38 kg strikes a bar of mass 1.76 kg perpendicularly at a point 0.12 m from the center of the bar and sticks to it.(adsbygoogle = window.adsbygoogle || []).push({});

If the bar is 0.66 m long and the clay is moving at 5.7 m/s before striking the bar, what is the final speed of the center of mass?

I found this part to be 1.012 m/s, which is correct, simply using conservation of linear momentum.

I can't figure out the next part:

At what angular speed does the bar/clay system rotate about its center of mass after the impact?

I tried using conservation of angular momentum, which seems to me like it should work, but the computer says it's wrong. I tried it assuming the center of mass doesn't change when the clay hits it, and then did it again figuring in the change in center of mass.

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# Homework Help: Conservation of Momentum (Linear and Angular)

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