A Simple Moment of Inertia Measurement

Autor/in	Hinrichsen, Peter F.
Titel	A Simple Moment of Inertia Measurement
Quelle	In: Physics Teacher, 60 (2022) 4, S.292-295 (4 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Hinrichsen, Peter F.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0031-921X
Schlagwörter	Motion; Scientific Concepts; Physics; Measurement + Suchen Sie Ihr Suchwort? Bewegungsablauf; Physik; Messverfahren
Abstract	Modern MEMs gyros/accelerometers allow the angular velocity of pendula to be precisely measured and the angular acceleration to be calculated. For a compound pendulum, "I"[subscript p][umlaut over theta]=-"mga" sin[theta]Ip[umlaut over theta]=-mgasin[theta], where "a" is the distance of the center of mass from the pivot, so the moment of inertia "I"[subscript p] of the compound pendulum about the pivot can be simply derived as "I"[subscript p]=-"mga"/[umlaut over theta]([subscript theta=pi/2])"I"p=-mga/([umlaut over theta])([theta=pi/2]) from measurements of the angular acceleration [umlaut over theta]([subscript theta/2])[umlaut over theta]([theta]=[pi]/2) when the pendulum is horizontal. Then "mga" can be determined by measuring the force and lever arm required to maintain the pendulum in a horizontal position. (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