Demonstrations

Falling Chimney

Code Number :	1Q20.50
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 :	Moment of Inertia
Area of Study :	Mechanics
Equipment :	Falling chimney apparatus with steel ball bearing or "Sad" ball out of the "Happy - Sad Ball Set," several pads of Sorbothane.
Procedure :	Set the apparatus up as shown. Quickly grab the supporting stick from between the hinged pieces. The ball that is on the end of the stick should land in the cup. Several pads of "Sorbothane" in the bottom of the cup will prevent the ball from bouncing out.

References

Gabriele U. Varieschi and Isabel R. Jully, "Toy Blocks and Rotational Physics", TPT, Vol. 43, # 6, p. 360, (Sept. 2005).

M. E. Bacon, Michael R. Harpst, and Ryohei Nakazawa, "Falling Sticks and Falling Balls," TPT, Vol. 40, # 6, p. 333, (Sept. 2002).

Hermann Hartel, "The Falling Stick with a > g," TPT, Vol. 38, # 1, p. 54, (Jan. 2000).

Ernie McFarland and Tom Kehn, "The Fantastic Physics Fun Show", TPT, Vol. 34, # 8, Nov. 1996, p. 512.

David Kagan and Alan Kott, "The Greater-than-g Acceleration of a Bungee Jumper, TPT, Vol. 34, # 6, p. 368- 373, (Sept. 1996).

"Figuring Physics", TPT, Vol. 30, # 2, Feb. 1992, p. 126.

Uri Haber-Schaim, "On Qualitative Problems", TPT, Vol. 30, # 5, May 1992, p. 206.

George Barnes, "Some Physics of a Falling Lamp Post", TPT, Vol. 30, # 2, Feb. 1992, p. 86.

Mark M. Payne, "On Qualitative Problems," TPT, Vol. 30, # 5, p. 260, (May 1992).

Joseph L. Spradley, "Meter-Stick Mechanics", TPT, Vol. 28, # 5, May 1990, p. 312.

F.M. Phelps, L.R. Clifford, Julie Simkins, and J. Gormley, "How the Ant Got into the Dish," TPT, Vol. 24, # 5, p. 293, (May 1986).

Jerry L. Adams, "Acceleration Greater than g", TPT, Vol. 20, # 2, Feb. 1982, p. 100 - 101.

Albert A. Bartlett, "More on the Falling Chimney", TPT, Vol. 14, # 6, September 1976, p. 351.

Albert A. Bartlett, "Falling Chimney Apparatus Modification", TPT, Vol. 13, # 7, Oct. 1975, p. 435.

J. Thomas Dickinson, "The Falling Meter Stick", TPT, Vol. 9, # 6, Sept. 1971, p. 336.

Wallace A. Hilton, "Free Fall Paradox", TPT, Vol. 3, # 7, Oct. 1965, p. 323.

Rod Cross, "The Fall and Bounce of Pencils and Other Elongated Objects", AJP, Vol. 74, # 1, Jan. 2006, p. 26.

Mark Denny, "Comment on: 'Gabriele Varieschi, Kaoru Kamiya, "Toy Models for the Falling Chimney", AJP, Vol. 74, # 1, Jan. 2006, p. 82.

Gabriele Varieschi, Kaoru Kamiya, "Toy Models for the Falling Chimney", AJP, Vol. 71, # 10, Oct. 2003, p. 1025.

W. F. D. Theron, "The "Faster Than Gravity" Demonstration Revisited", AJP, Vol. 56, # 8, Aug. 1988, p. 736.

Ernest L. Madsen, "Theory of the Chimney Breaking While Falling", AJP, Vol. 45, # 2, Feb. 1977, p. 182.

My- 6, Freier and Anderson, A Demonstration Handbook for Physics.

M-104, "Falling Stick Acceleration > g," DICK and RAE Physics Demo Notebook.

M- 206, Richard Manliffe Sutton, Demonstration Experiments in Physics.

Wallace A. Hilton, "Free Fall Paradox," Physics Demonstration Experiments.

Tik Liem, "The Mysteriously Moving Steel Ball," Investigation to Science Inquiry.

"235, Faster than Free Fall," Christopher P. Jargodzki and Franklin Potter, Mad About Physics, p. 93, 229.

James Cunningham and Norman Herr, "Acceleration Greater than Gravity," Hands-on Physics Activities with Real-Life Applications, p. 83.

Rocco C. Blasi, "Cenco-Miller Hinged Stick and Falling Ball Demonstrator," Physics Fun and Demonstrations.

Robert Ehrlich, "F.15, Pennies on a Falling Meterstick", Turning the World Inside Out, p. 82.

Joey Green, "Brainy Ball", The Mad Scientist Handbook, Vol. 2, p. 13.

Mail Questions and Comments to: Dale Stille