Using physics to flip a water bottle
The water bottle flipping craze, in which a partially filled bottle of water is flipped and magically lands upright, swept the globe a couple of years ago. Now a group of Dutch scientists has designed a classroom demo version of the feat, described in a recent paper in the American Journal of Physics. It is designed to illustrate the principle of conservation of angular momentum and includes handy tips on how to optimize your chances of successfully performing the trick.
Source: Physics holds the key to performing the flipping water bottle trick | Ars Technica
A great look into the rotational dynamics involved with bottle flipping, including how to increase your chances of sticking the landing.
