5H20.25 - Revolution

Code Number:
5H20.25
Demo Title:
Revolution
Condition:
Excellent
Principle:
Frictionless Motion
Area of Study:
Perpetual Motion
Equipment:
Revolution Demo.
Procedure:

Place the armature magnet over the base piece and against the mirror. Gently spin the armature. Observe the smooth rotation and long spin period.

References:
  • David Kagan , "Building a Magnetic Levitation Toy", TPT, Vol. 31, # 7, Oct. 1993, p. 432.
  • H. Richard Crane, "Magnetic Levitation (Almost)", TPT, Vol. 30, # 9, Dec. 1992, p. 540.
  • Michael J. Pechan, Alexandra O'Brien, and Wesley A. Burgei, "Conversation of Angular Momentum Apparatus Using Magnetic Bearings", TPT, Vol. 39, # 1, Jan. 2001, p. 26.
  • Jodi and Roy McCullough, "Magnetic Levitation with Revolution", The Role of Toys in Teaching Physics, p. 4.176.
  • James D. Livingston, "Maglev", Driving Force-The Natural Magic of Magnets, p. 156.

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.