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ERIC Number: EJ1014991
Record Type: Journal
Publication Date: 2013-Apr
Pages: 1
Abstractor: As Provided
ISSN: ISSN-0031-921X
The Rocker (An Easy Anharmonic Oscillator for Classroom Demonstration)
Lieberherr, Martin
Physics Teacher, v51 n4 p231 Apr 2013
Every instructor should know some easy examples of anharmonic oscillations. The rocking of an empty wine bottle or a slender beer glass is one of those: The angle is not a sinusoidal function of time and the period is not independent of the amplitude, not even for small amplitudes. But care has to be taken that the glass does not slip or rotate around a vertical axis. LEGO rockers (see Fig. 1) are much more reliable and versatile. (Contains 2 figures.)
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Reports - Descriptive; Journal Articles
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A