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Abstract:

We describe a simple but quantitative experiment to demonstrate the conservation of angular momentum. We measure the correlation of the apparent radius and angular velocity of the Sun with respect to the stars, due to the conservation of the angular momentum of Earth in its orbit. We also determine the direction of Earth's angular momentum vector and show that it is conserved. The experiment can be performed using a small telescope and a digital camera. It is conceptually simple, allowing students to get direct physical insight from the data. The observations are performed near the resolution limit imposed by the atmosphere, and in the presence of strong competing effects. These effects necessitate a careful experimental setup and allow students to improve their skills in experimentation. © 2015 American Association of Physics Teachers.

Registro:

Documento: Artículo
Título:A demonstration of the conservation of the orbital angular momentum of Earth
Autor:Pellizza, L.J.; Mayochi, M.G.; Brazzano, L.C.; Pedrosa, S.E.
Filiación:Instituto Argentino de Radioastronomía (CONICET), C.C. 5, B1894ZAA, Villa Elisa, Pcia. de Buenos Aires, Argentina
Scuola Italiana Cristoforo Colombo, Ramsay 2251, C1428BAI, Buenos Aires, Argentina
Dpto. de Física 'J.J. Giambiagi', FCEyN, Universidad de Buenos Aires, Int. Güiraldes 2620, C1428EGA, Buenos Aires, Argentina
Facultad de Ingenieŕia, Universidad de Buenos Aires, Av. Paseo Colón 850, C1063ACV, Buenos Aires, Argentina
Instituto de Astronomía y Física del Espacio (CONICET/UBA), C.C. 67, Suc. 28, C1428ZAA, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina
Año:2015
Volumen:83
Número:12
Página de inicio:1019
Página de fin:1027
DOI: http://dx.doi.org/10.1119/1.4932397
Título revista:American Journal of Physics
Título revista abreviado:Am. J. Phys.
ISSN:00029505
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00029505_v83_n12_p1019_Pellizza

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Citas:

---------- APA ----------
Pellizza, L.J., Mayochi, M.G., Brazzano, L.C. & Pedrosa, S.E. (2015) . A demonstration of the conservation of the orbital angular momentum of Earth. American Journal of Physics, 83(12), 1019-1027.
http://dx.doi.org/10.1119/1.4932397
---------- CHICAGO ----------
Pellizza, L.J., Mayochi, M.G., Brazzano, L.C., Pedrosa, S.E. "A demonstration of the conservation of the orbital angular momentum of Earth" . American Journal of Physics 83, no. 12 (2015) : 1019-1027.
http://dx.doi.org/10.1119/1.4932397
---------- MLA ----------
Pellizza, L.J., Mayochi, M.G., Brazzano, L.C., Pedrosa, S.E. "A demonstration of the conservation of the orbital angular momentum of Earth" . American Journal of Physics, vol. 83, no. 12, 2015, pp. 1019-1027.
http://dx.doi.org/10.1119/1.4932397
---------- VANCOUVER ----------
Pellizza, L.J., Mayochi, M.G., Brazzano, L.C., Pedrosa, S.E. A demonstration of the conservation of the orbital angular momentum of Earth. Am. J. Phys. 2015;83(12):1019-1027.
http://dx.doi.org/10.1119/1.4932397