It’s been a while since I blogged about my rubber band ball, so here it is:
It currently weighs 208 pounds, and its diameter is about 22 inches. (I put my book in front of it for perspective.) Whenever people see the ball in person and guess how much it weighs, they’re always way off. No one ever thinks it weighs this much because it’s so dense and compact. At this point, when I add a pound of bands, the diameter increases by just a tiny fraction of an inch. (By comparison, if you were to add a pound of bands to a plum-sized ball, its diameter could double in size.) The reason is that my ball has a lot of surface space, so a pound of bands doesn’t come close to covering it. To prove it…the last pound of bands I added was all red, and you can still see the tan ones underneath, as well as a few blues and greens.
And that’s pretty much it.
Dorkiness + physics = fun.