PURPOSE: To illustrate dramatically centripetal force and centrifugal reaction.
DESCRIPTION: Put some water in the bucket and rotate the bucket in a vertical
circle over your head. The
centripetal force provided by your arm keeps the water bucket moving in a circle, while
the centrifugal reaction
keeps the water in the bottom of the bucket, as long as the rotational velocity is
sufficient.
EQUIPMENT: Bucket.
SETUP NOTES: Practice, practice, practice. It is easy to hit your
leg when swinging it around so practice doing it correctly BEFORE the class.