A steel ball is placed on a golf tee at the end of
a hinged board that is propped up by a stick. When the stick is quickly
removed, the board falls, making the cup move through just enough of an arc
for the ball to fall into the cup.
Click
on Image for Quicktime Animation
This demo can be found in cabinet B on shelf 1 of the UCSD PUL Demo Room
(WLH 2015).