Wiktionary
point masses
n. (point mass English)
Usage examples of "point masses".
For as the science of the eighteenth and nineteenth centuries progressed, the mechanics of point masses was extended to describe gravitation, electrostatics, the behavior of rigid bodies, then of continuous deformable media, and so to fluids and things like kinetic theories of heat.
If the Earth and the falling object were ideal point masses, with no length, no width, and no depth, then there are no other properties to speak of.