Topic
Four-force
About: Four-force is a research topic. Over the lifetime, 3459 publications have been published within this topic receiving 87308 citations.
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01 Jan 2005
TL;DR: In this paper, a partly pedagogical, partly historical and partly technical review of special relativity and its experimental foundations is presented in honor of the centenary of Einstein's annus mirabilis.
Abstract: This article is a partly pedagogical, partly historical and partly technical review of special relativity and its experimental foundations, in honor of the centenary of Einstein's annus mirabilis.
25 citations
TL;DR: In this article, it was pointed out that if one did not know the Einstein-HamiltonJacobi equation one might hope to derive it straight off from plausible first principles, without ever going through the formulation of the Einstein field equations themselves.
Abstract: It is pointed out that if one did not know the Einstein--HamiltonJacobi equation one might hope to derive it straight off from plausible first principles, without ever going through the formulation of the Einstein field equations themselves. (auth)
25 citations
TL;DR: In this paper, the authors provide a better understanding of the ways natural laws would behave within the framework of Special Relativity, and on how this understanding may be used for practical purposes.
Abstract: Newton’s third law states that any action is countered by a reaction of equal magnitude but opposite direction. The total force in a system not affected by external forces is thus zero. However, according to the principles of relativity a signal cannot propagate at speeds exceeding the speed of light. Hence the action cannot be generated at the same time with the reaction due to the relativity of simultaneity, thus the total force cannot be null at a given time. The following analysis provides for a better understanding of the ways natural laws would behave within the framework of Special Relativity, and on how this understanding may be used for practical purposes. It should be emphasized that although momentum can be created in the material part of the system as described in the following work momentum cannot be created in the physical system, hence for any momentum that is acquired by matter an opposite momentum is attributed to the electromagnetic field.
25 citations
Book•
26 Nov 2007
TL;DR: In this article, Westwell-Roper discusses the ontology and methodology in Relativity, and how Euclidean geometry has misled metaphysics and how to make things have happened.
Abstract: Preface Introduction Part I. Ontology and Methodology in Relativity: 1. On learning from the mistakes of Positivists 2. What ontology can be about with Andrew Westwell-Roper 3. Special relativity is not based on causality 3. Simultaneity and convention in special relativity 5. Motion and change of distance Part II. Variable Curvature and General Relativity: 6. How Euclidean geometry has misled metaphysics 7. What can geometry explain? 8. Is curvature intrinsic to physical space? 9. Holes in the hole argument Part III. Time and Causation: 10. Can time be finite? 11. How to make things have happened Bibliography Index.
25 citations