Answer 1:
Well, if you think of gravity as an effect of
the curvature of spacetime, it's really best not
to think of it as a force anymore. Instead,
it's better to think of the attraction of
gravity as the effect of spacetime curvature on
the trajectory of an object. For example,
instead of thinking about the sun pulling on the
Earth to keep it in orbit, you can think of the
sun as warping the spacetime around it. As the
Earth moves through this warped spacetime, it
ends up traveling on a curved path.
Now, I'm not quite sure what you mean by
an "omnidirectional" force; certainly, any
object moving in a curved spacetime will have
its trajectory affected by this curvature. In
particular, this curvature doesn't only affect
the center of mass of an object; it affects the
entire body of an extended object. Does this
answer your
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