Thank you for the responses!
I didn't realize that objects moving linearly could have angular momentum; I thought angular momentum only applied to objects undergoing rotational motion. Now I see that all objects in motion have angular momentum, with respect to an origin. Thanks!
So...
[SOLVED] Sticky Collision with Clay Ball and Rod
Homework Statement
A uniform rod of mass m and length \ell = 2 meters is suspended from one end by a frictionless pivot so that it can swing freely in the x-y plane. When the rod is at rest it is struck by a clay ball of equal mass m with...