English

Energy in Newtonian gravity

General Relativity and Quantum Cosmology 2023-07-26 v2 History and Philosophy of Physics

Abstract

In Newtonian gravity it is a moot question whether energy should be localized in the field or inside matter. An argument from relativity suggests a compromise in which the contribution from the field in vacuum is positive definite. We show that the same compromise is implied by Noether's theorem applied to a variational principle for perfect fluids, if we assume Dirichlet boundary conditions on the potential. We then analyse a thought experiment due to Bondi and McCrea that gives a clean example of inductive energy transfer by gravity. Some history of the problem is included

Keywords

Cite

@article{arxiv.2112.06503,
  title  = {Energy in Newtonian gravity},
  author = {Ingemar Bengtsson and Tobias Eklund},
  journal= {arXiv preprint arXiv:2112.06503},
  year   = {2023}
}

Comments

Version 2 has 18 pages, and was much improved by referees

R2 v1 2026-06-24T08:14:37.972Z