Demonstrations

Whirligig

Code Number :	1D50.20
Disclaimer:	Reprinted by permission of Dick Berg, University of Maryland, for use on this website. The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources. Further information regarding legal liability in use of demonstrations and labs will be found on the web site Injuries in School/College Laboratories in USA. The University of Iowa Disclaimers: U of Iowa Disclaimer All Rights Reserved.
Condition :	Good
Principle :	Conservation of Angular Momentum
Area of Study :	Mechanics
Equipment :	String through tube with 2 unequal masses, additional masses.
Procedure :	The two masses on a string when once started whirling is most safely stopped by pulling back down on the large weight.

References

Jeff Whittaker, "Demonstrating Circular Motion With a Model Satellite/ Earth System", TPT, Vol. 46, # 4, April 2008, p. 237.

James L. Hunt, "Five Quantitative Physics Experiments (Almost) Without Special Apparatus", TPT, Vol. 43, # 7, Oct. 2005, p. 412.

Robert Johns, "Acceleration Without Force?" TPT, Vol. 41, # 3, p. 156, March 2003.

Martin Gardner, "The Twirled Ring", TPT, Vol. 40, # 1, Jan. 2002, p. 51.

Desmond N. Penny, "A Nonuniform Circular - Motion Experiment", TPT, Vol. 38, # 8, Nov. 2000, p. 483.

John L. Makous, "Variations of a Circular-Motion Lab," TPT, Vol. 38, # 6, p. 354, Sept. 2000.

Bill Jameson, "Additions to a Circular- Motion Lab," TPT, Vol. 37, # 9, p. 545, Dec. 1999.

Charles Henderson, "Measuring the Forces Required for Circular Motion," TPT, Vol. 36, # 2, p. 118, Feb. 1998.

"Figuring Physics", TPT, Vol. 32, # 3, Mar. 1994, p. 186.

Paul G. Hewitt, "Typo", TPT, Vol. 32, # 5, May 1994, p. 262.

Kaye M. Elsner, "Visualizing Centripetal Force", TPT, Vol. 32, # 3, Mar. 1994, p. 176.

G.J. Aubrecht, A.P. French, M. Iona, and D.W. Welch, "The Radian - That Troublesome Unit," TPT, Vol. 31, # 2, p. 84, Feb. 1993.

Juan Lin, "A Demonstration of Kepler's Third Law," TPT, Vol. 31, # 2, p. 122, February 1993.

"How Can Work Be Done In This Case?", TPT, Vol. 15, # 5, May 1977, p. 309.

Frank S. Crawford, "Explaining the Orbital Velocity of an Earth Satellite," AJP, 55, (3), March 1987.

Mm-1, 2, Ms- 5: Freier and Anderson, A Demonstration Handbook for Physics.

M-198: "Three Neons & Ball on a String," DICK and RAE Physics Demo Notebook.

M- 742: "Ball on String-Coin in Balloon," DICK and RAE Physics Demo Notebook.

Tik Liem, "A Measure of Centripetal Force," Investigation to Science Inquiry, 14.18, 380.

16, "In and Out," Janice VanCleaves 201 Awesome, Magical, Bizarre, & Incredible Experiments.

32, "In and Out," Janice VanCleave. Astronomy for Every Kid: 101 Easy Experiments That Really Work, p. 70.

The Project Physics Course - Teachers Resource Book, "Concepts in Motion," E12: "Centripetal Force," p. 84.

Robert Ehrlich, "Whirligig with a Hanging Weight," Turning the World Inside Out, p. 72- 73.

Mail Questions and Comments to: Dale Stille