On Motion, Its Relativity and the Equivalence Principle
Gabriel Barceló*
Advanced Dynamics S.A., Madrid, Spain.
DOI: 10.4236/jmp.2014.517180   PDF   HTML   XML   7,356 Downloads   8,543 Views   Citations


The Equivalence Principle put forward by Albert Einstein is currently undergoing comprehensive revision to determine its degree of accuracy. Notwithstanding, this principle refers to a very specific circumstance, as free-fall; thus in our opinion it cannot be generalised to any other movement in space. This paper refers to the dynamic hypotheses of moving rigid bodies and a particular, structured theory that would establish how such bodies behave when subject to different actions that oblige them to make successive, non-coaxial spins. With respect to bodies subject to acceleration by rotation, we understand that there are indications to identify the prior dynamic state of the moving object and that examples of a violation of the aforementioned Equivalence Principle can be deduced thereof. Based on the findings of this paper and the theory put forward herein, we suggest that an observer can identify the prior situation of absolute rest or absolute non-rotation of a body, thus leading to the conclusion that movement does not necessarily have to be a relative concept. The foregoing leads us to propose that the Equivalence Principle is fully valid for the situation put forward by Albert Einstein, but cannot be generalised to any dynamic situation.

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Barceló, G. (2014) On Motion, Its Relativity and the Equivalence Principle. Journal of Modern Physics, 5, 1839-1847. doi: 10.4236/jmp.2014.517180.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Einstein, A. (1907) Uber das Relativitatsprinzip und die aus demselben gezogene Folgerungen, Jahrbuch der Radioaktivitaet und Elektronik. [On the Relativity Principle and the Conclusions Drawn from It. In: The Collected Papers of Albert Einstein. Vol. 2: The Swiss Years: Writings, 1900-1909, Princeton University Press, Princeton.]
[2] Barcelo, G. and Catalan Sanudo, M.A., Eds. (2012) Arpegio. Sant Cugat. Chap. XIV.
[3] Landau, L.D. and Lifshitz, E.M. (1976) Mechanics. 3rd Edition, Volume 1 (Course of Theoretical Physics), Butterworth-Heinemann, Oxford.
Landau, L.D. and Lifshitz, E.M. (1994) Mecanica. Editorial Reverte S.A., Argentina, 24.
[4] Goldstein, H., Poole, C. and Safko, J. (2000) Classical Mechanics. 3rd Edition, Addison-Wesley, Boston.
[5] Barcelo, G. (2005) El vuelo del bumeran (The Flight of the Boomerang). Editorial Marcombo, Barcelona.
[6] Barcelo, G. (2010) On the Equivalence Principle AC-10-A.2.1.1. 61st International Astronautical Congress, Prague.
Barcelo, G. (2011) Analysis of Dynamic Field Systems Accelerated by Rotation. Dynamics of Non-Inertial Systems. DeMSET-2011 Congress, Miami.
[7] Advanced Dynamics S.A.
[8] Barcelo, G. (2012) World Journal of Mechanics, 2, 175-180.
[9] Barcelo, G. (2013) Imago Universi: A Story of the Human Conception of the Cosmos. Ed. Arpegio, Barcelona.
[10] Barcelo, G. (2013) International Journal of Astronomy and Astrophysics, 3, 385-391.
[11] Barcelo, G. (2013) Global Journal of Researches in Engineering, 13.
[12] Jouffret, M.E. (1874) Theorie elementaire des phenomenes que presentent le gyroscope, la toupie et le projectile oblong. Revue d’Artillerie, Berger-Levrault et Gauthier-Villars, Paris.
Gilbert, P. (1876) Probleme de la rotation d’un corps solide autour d’un point. Annales de la Societe Scientifique de Bruxelles, 316.
[13] Hirn (1876) Theorie analytique elementaire du gyroscope. In: Gilbert, P., Ed., Probleme de la rotation d’un corps solide autour d’un point, Annals de la societe scientifique de Bruxelles, Bruxelles.
[14] Poinsot, L. (1878) Theorie nouvelle de la rotation des corps, 1834. In: Gilbert, P., Ed., Probleme de la rotation d’un corps solide autour d’un point fixe, Annals de la societe scientifique de Bruxelles, Bruxelles, 258.
Poinsot, L. (2005) Theorie nouvelle de la rotation des corps, 1834. In: Barcelo, G., Ed., El vuelo del bumeran (The Flight of the Boomerang), Marcombo, 121.
[15] Barcelo, G. (2013) World Journal of Mechanics, 3, 328-338.
[16] Barcelo, G. (2014) Journal of Applied Mathematics and Physics, 2, 569-580.
[17] Bauluz, E. New Dynamic Hypotheses.
[18] Theory of Dynamic Interactions.
[19] Perez, L. (2013) World Journal of Mechanics, 3, 174-177.
[20] Perez, L.A. (2013) Reflecting New Evidence on Rotational Dynamics.
[21] Newton. Principia, Im. Du Chasteller, Paris, Proposition 2, 1757.
[22] Mach, E. (1921) Die Mechanik in Ihrer Entwicklung Historisch-Kritisch Dargestellt. Leipzig, Brockhaus.
[23] Barcelo, G. (2010) On the Equivalence Principle AC-10-A.2.1.1. Proceedings of the 61st International Astronautical Congress, Prague, 27 September-1 October 2010.

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