1Q40.70 - Cons. of Angular Momentum - Vortex Cone

40 Inch Diameter Funnel
Code Number:
Demo Title:
Cons. of Angular Momentum - Vortex Cone
Conservation of Angular Momentum
Area of Study:
Vortex Cones and Stands (Large and Small Models), Ball Bearings (Assorted Sizes), Rotating Support.

The Vortex Cones may have to be cleaned using plastic polish and a soft cloth. The 1 inch steel balls seem to work very well in the large model.

24 inch diameter and 40 inch diameter fiberglass cones are available plus the smaller 10 inch plastic cone.

  • Yasuo Ogawara, "Using a Vortx to Teach Kepler's Laws and Potential Energy", TPT, Vol. 56, #8, Nov. 2018, p. 552.
  • William A. Dittrich, "Drop Tower Physics", TPT, Vol. 52, #7, Oct. 2014, p. 415.
  • "Figuring Physics", TPT, Vol. 37, #8, Nov. 1999, p. 475.
  • Juan Lin, "A Demonstration of Kepler's Third Law", TPT, Vol. 31, #2, Feb. 1993, p. 122.
  • David R. Lapp, "Bigger Cap... Bigger Spark", TPT, Vol. 30, #8, Nov. 1992, p. 454.
  • "Bags, Balloons, and Such", TPT, Vol. 30, #6, Sept. 1992, p. 379.
  • R.D. Edge, "The Funny Physics Funnel", TPT, Vol. 28, #8, Nov. 1990, p. 575.
  • Emory Kimbrough, "Beyond Balloon Fun", TPT, Vol. 25, #9, Dec. 1987, p. 546.
  • "Letters", TPT, Vol. 25, #9, Dec. 1987, p. 546.
  • William Blunk, William Kopp, and Earl Zwicker, "Doing Physics", TPT, Vol. 25, #1, Jan. 1987, p. 59.
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  • David G. Willey, "Extending A Demonstration", TPT, Vol. 22, #9, Dec. 1984, p. 554.
  • David L. Mott, "Demonstrating Conservation of Angular Momentum", TPT, Vol. 22, #6, Sept. 1984, p. 391.
  • James G. Ellingson, "The Deflection of Light by the Sun Due to Three-Space Curvature", AJP, Vol. 55, #8, Aug 1987, p. 759.
  • Albert Ackroyd and Hendrik J. Gerritsen, "A Retrograde Motion Demonstration Model", AJP, Vol. 54, #11, Nov 1986, p. 1021.
  • S-075, "VORTX Funnel Coin Collector", DICK and RAE Physics Demo Notebook.
  • M-822, "Garbage Bag - VORTX - Ball & String", DICK and RAE Physics Demo Notebook.
  • M-742, "Ball on String - Coin in Balloon", DICK and RAE Physics Demo Notebook.

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.