Physics – Classical Physics
Scientific paper
2011-03-17
Eur.J.Phys.32:895-903,2011
Physics
Classical Physics
11 pages, Latex file
Scientific paper
10.1088/0143-0807/32/4/005
Bertrand's theorem in classical mechanics of the central force fields attracts us because of its predictive power. It categorically proves that there can only be two types of forces which can produce stable, circular orbits. In the present article an attempt has been made to generalize Bertrand's theorem to the central force problem of relativistic systems. The stability criterion for potentials which can produce stable, circular orbits in the relativistic central force problem has been deduced and a general solution of it is presented in the article. It is seen that the inverse square law passes the relativistic test but the kind of force required for simple harmonic motion does not. Special relativistic effects do not allow stable, circular orbits in presence of a force which is proportional to the negative of the displacement of the particle from the potential center.
Bhattacharya Kaushik
Kumar Prashant
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