Title: Damped mechanical oscillator : experiment and detailed energy analysis
Authors : Corridoni, Tommaso
D'Anna, Michele
Fuchs, Hans Ulrich
Published in : The Physics teacher
Volume(Issue) : 52
Issue : 2
Pages : 88
Pages to: 90
Publisher / Ed. Institution : American Association of Physics Teachers
Issue Date: 2014
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subject (DDC) : 530: Physics
Abstract: The damped oscillator is discussed in every high school textbook or introductory physics course, and a large number of papers are devoted to it in physics didactics journals. Papers typically focus on kinematic and dynamic aspects and less often on energy. Among the latter, some are devoted to the peculiar decreasing behavior of energy characterized by ripples, which can easily be demonstrated by using a dynamic modeling approach. In this note we consider an oscillator consisting of a cart running on a horizontal track, two springs, and a damping device created with magnets and a metal plate attached to the cart. Using sensors and data-acquisition software, we measure kinematic quantities and three forces: those of the springs on the cart and, separately, the force between magnets and the plate. A detailed analysis of the energy exchanges between the cart and the interacting parts is obtained. In particular, we show that only the energy exchanges with the magnets are affected by dissipative processes while over a suitable time interval the net energy exchanged between cart and springs equals zero.
Departement: School of Engineering
Organisational Unit: Institute of Applied Mathematics and Physics (IAMP)
Publication type: Article in scientific Journal
DOI : 10.1119/1.4862111
ISSN: 0031-921X
URI: https://digitalcollection.zhaw.ch/handle/11475/13375
Appears in Collections:Publikationen School of Engineering

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