This picture is meant to show the basic physics of a bowling ball mortar. This is part of a thread on THR, but my stupid crappy picture was too big to post there, so I am just redirecting traffic here. I suppose if you want to comment on the mortar, you can, but this post is probably going to get deleted in a few days barring massive popularity and fame. Or, if the commentary is intelligent (even if I am wrong), I may just leave it up for nerds to ponder. Whatever.