  Planck's formula and General Relativity indicate that potential energy
influences spacetime. Using Einstein's Equivalence Principle and an extension
of his Chock Hypothesis, an explicit description of this influence is derived.
We present a new relativity model by incorporating the influence of the
potential energy on spacetime in Newton's dynamics for motion under a central
force. This model extends the model used by Friedman and Steiner to obtain the
exact precession of Mercury without curving spacetime. We also present a
solution of this model for a hydrogen-like atom, which explains the reason for
a probabilistic description.
