| Hands on and homemade coupled oscillators for Project Listen Up. | |
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MedLine Citation:
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PMID: 19355097 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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A coupled pendulum oscillator experiment recently developed within the U.S. Naval Academy Physics Department seems a possible candidate for the Project Listen Up initiative. A plexiglass frame supported by four legs suspends two 500 g masses 30 cm below by two chains of paper clips each, meeting in the shape of a V on either bob. A light spring (k=3.64 Nm) connects the two, completing the coupled oscillator system. Displacement of the oscillators was measured using Pasco motion sensors, a Vernier LabPro unit, and a laptop. LOGGERPRO and MATHEMATICA software helped compare theory with experiment. However, one does not need these resources to experiment with coupled oscillators-it can be improvised using ordinary household materials for young students! An inexpensive wooden picture frame with islet screws supports pendulums using two Dixie cups filled with sand or coins as masses. The possibilities for learning seem endless! A simple stopwatch, meter stick, fulcrum, and measuring cups are incorporated in experimental and theoretical comparisons, including the periods of normal modes. Students can explore density through balancing masses with volumes of water. Demonstrating beat frequencies from mistuned xylophone bars or guitar strings conveys a subtlety of the experiment without overpowering the young minds of future scientists. |
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Authors:
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Sean M Mock; Murray S Korman |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 125 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2009 Apr |
Date Detail:
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Created Date: 2009-04-09 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 2626 Citation Subset: IM |
Affiliation:
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Dept. of Phys., U.S. Naval Acad., Annapolis, MD 21402, m114518@usna.edu. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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