[math-fun] Bowling Ball physics

I have no idea what the underlying dynamics are for a spinning bowling ball -- I'd have thought it was relatively simple: that you could model a variable-density sphere as a uniform density sphere with an offset [point] weight. But apparently not. The bowling ball manufacturers have continued to come out with fanciful and interesting "core layouts" for bowling balls. I mentioned this once before [year or two back] but I happened to recently run across a "directory" of recently released balls with core layouts. For your amusement: <http://www.fantasyfarm.com/bowl> /Bernie\ -- Bernie Cosell Fantasy Farm Fibers mailto:bernie@fantasyfarm.com Pearisburg, VA --> Too many people, too few sheep <--