# Do gravitational mass equalling inertial mass when object is at rest just a coincidence?

Rest mass can be thought of as the measure of energy that object posses. This mass that appears in Newton law of motion measures inertia and hence called inertial mass. Gravitational mass is like charge in coloumb law and tells us how much gravitational force one feels. Just like electrostatic force doesn't change depending on frames, gravitational force doesn't change even if one is moving. When object is at rest both inertial mass and gravitational mass becomes equal. Is it a mere coincidence. what does this implies?

A more precise theory of gravity, presumably a theory of $$\textit{quantum}$$ gravity, would likely involve a disparity in gravitational mass and inertial mass that would reduce to equality in weak spacetime curvatures, yielding the predicted dynamics of general relativity.