The Principle of Equivalence: Demonstrations of Local Effective Vertical and Horizonta

• Autores: H Múnera
• Localización: The Physics Teacher, ISSN 0031-921X, Vol. 48, Nº. 2, 2010, págs. 131-133
• Idioma: inglés
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• Resumen

  • It has been suggested that Einsteins principle of equivalence PE should be introduced at an early stage.1This principle leads to the notion of local effectivegravity, which in turn defines effective vertical and horizontal directions. Local effective gravity need not coincide with the direction of terrestrial gravity. This paper describes three classroom demonstrations that we have used to teach the concepts of the effective horizontal plane and the effective vertical direction to students at National University in Bogota´.