# Kinetic energy loss in a gravitational field.

WannabeNewton
Yes because in the force based formulation of Newtonian gravity, given appropriate boundary conditions there is a unique way to separate the derivative operator ##\nabla## from the gravitational potential ##\varphi##. In the standard metric formulation of GR this is not possible. In the geometrized formulation of Newtonian gravity (in which gravity is also a manifestation of space-time curvature) we run again into the same problem as in GR of having no meaningful notion of local gravitational energy density.

mfb
Mentor
A compressed spring stores its energy in the electromagnetic field between the atoms. It is just potential energy ;).

Dale
Mentor
2020 Award
Closed pending moderation.

EDIT: this thread will remain closed due to some speculation. The answer to the question has been given: the energy is stored in the gravitational field. As mfb mentioned, energy is usually stored in fields at some level.

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