Centripetal swinging tray, improving an old demonstration

The centripetal swinging bucket ad tray demonstrations has been around for centuries and is a classic physics demonstration that can be done at students of all ages. Changing fro using a bucket of water to using a tray with cups of water was a good improvement in the demonstration and in this video I attempt to some additional upgrades to the demonstration to make it a bit more interesting.

this video is a reposting of a previous video that included copyrighted music. It has been removed from this version

Here is another YouTube video on the swinging tray that I posted previously https://youtu.be/vhNfIydKyRQ