The Physical Pendulum: An Illustrative Teaching Laboratory Example Using a Long Rod

Autor/inn/en	Palacios Gómez, Jesús; Villagómez, Roque André Eleazar Arroyo
Titel	The Physical Pendulum: An Illustrative Teaching Laboratory Example Using a Long Rod
Quelle	In: Physics Teacher, 61 (2023) 1, S.76-78 (3 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Palacios Gómez, Jesús)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0031-921X
Schlagwörter	Physics; Science Instruction; Science Laboratories; Motion; Scientific Concepts; Science Experiments; Laboratory Experiments; College Science + Suchen Sie Ihr Suchwort? Physik; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Bewegungsablauf; Laboratory work; Laborarbeit
Abstract	Here, a relatively simple laboratory experiment of a physical pendulum, suitable for students of science and engineering in the first courses of university physics, is presented to illustrate its dynamic behavior and to determine its inertia moment. To this end, a long wooden rod of length L = 99.8 cm and cross-section radius R = 1.73 cm was used as the physical pendulum. The period of oscillation was measured as a function of the distance from the rotation axis to the center of mass. It is shown that the oscillation period is a superposition of two contributions, namely, a linear and a hyperbolic function, which has a minimum at the distance h[subscript min] = [square root] I[subscript 0]/M?, where I[subscript 0] is the moment of inertia of the rod about the rotation axis at its center of mass, and M is its mass. It is further shown that this quantity is independent of mass for all bodies of constant density, and a numerical method is applied to obtain the moment of inertia of the rod. Results obtained from a laboratory experiment agree with the expected one within 4%. (As Provided).
Anmerkungen	American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail: pubs@aapt.org; Web site: http://aapt.scitation.org/journal/pte
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01