Normal forces in stationary spacetimes

Details Normal forces in stationary spacetimes Normal forces in stationary spacetimes

2004-01-30

arxiv.org/abs/gr-qc/0401123v1

Gen.Rel.Grav. 36 (2004) 2171-2173

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

2 pages, no figs, RevTex, submitted to GRG

Scientific paper

10.1023/B:GERG.0000038631.91084.

For geodesic motion of a particle in a stationary spacetime the $U_0$ component of particle 4-velocity is constant and is considered to be a conserved mechanical energy. We show that this concept of a conserved mechanical energy can be extended to particles that move under the influence of a ``normal force,'' a force that, in the stationary frame, is orthogonal to the motion of the particle. We illustrate the potential usefulness of the concept with a simple example.

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