Question

Can we always effectively describe a timelike worldline (non-geodesic) in one spacetime as a geodesic in some other spacetime?

Answer 1

Hey !

______________________________

With this assumption, one can relate the Minkowski proper time, which is the invariant length of a segment of a timelike worldline

______________________________

Thanks !

Answer 2

Answer:

Is this implied by the equivalence principle saying that acceleration and gravitation are indistinguishable.