Centrifugal tray////Homemade science with Bruce Yeany

The classic demonstration of swinging a bucket over your head is taken up on notch by swinging a cup of water on a tray. Swing vertically or horizontally or a combination of both and the water remains in the cup to the "centrifugal force" acting on the cup. WHile this and other experiments demonstrating centrifugal force are a lot of fun, the concept can be misleading . A good lesson should accompany centrifugal force demonstrations to help clear up any misconceptions.

Homemade science is a collection of classroom tested ideas, suggestions, projects, and experiments that I have used in teaching physical science for the Annville-Cleona school district in central Pennsylvania. I am currently in my 38th year of teaching. My intention is to share these ideas with other teachers or anyone who has an interest in science. I have found that designing and building my own equipment has taught me more than any course that I have ever taken. I hope that you consider trying this for yourself.. I also share and show some of these ideas at workshops, science conferences, or inservice presentations.
Videos are shot with a Casio EXH20. Slow motion video clips are either 3.5 or 7 times slower.