Abstract
This paper conveys information about a Physics laboratory experiment for students with some theoretical knowledge about oscillatory motion. Students construct a simple pendulum that behaves as an ideal one, and analyze model assumption incidence on its period. The following aspects are quantitatively analyzed: vanishing friction, small amplitude, not extensible string, point mass of the body, and vanishing mass of the string.
It is concluded that model assumptions are easily accomplished in practice, within small experimental errors. Furthermore, this way of carrying out the usual pendulum experiments promotes a better understanding of the scientific modeling process. It allows a deeper comprehension of those physical concepts associated with model assumptions (small amplitude, point mass, etc.), whose physical and epistemological meanings appear clearly related to the model context. Students are introduced to a scientific way of controlling the validity of theoretical development, and they learn to value the power and applicability of scientific modeling.
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References
Bunge, M.: 1967, Scientific Research, Springer-Verlag, Berlin-Heidelberg-New York.
Resnick, R., Halliday, D. & Krane, K.: 1992, Physics, Vol. I, 4th. edn, John Wiley & Sons. Inc., New York.
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Medina, C., Velazco, S., Salinas, J. (2005). Experimental Control of Simple Pendulum Model. In: Matthews, M.R., Gauld, C.F., Stinner, A. (eds) The Pendulum. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3526-8_5
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DOI: https://doi.org/10.1007/1-4020-3526-8_5
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-3525-8
Online ISBN: 978-1-4020-3526-5
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