# Gravity and Collision of two continuous mass distributions [closed]

How could one explain the collision of two continuous mass distributions in view of

gravitation (Newtonanian and General relativity) ?

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What exactly is it that you want explained about the collision? –  David Z Nov 19 '10 at 5:35
@David Zaslavsky: I have asked in a cooment on Jerry Schrimer's answer. –  Rajesh D Nov 19 '10 at 6:08
I think you are all going too far with this black hole thing, my opinion is that he is just asking the different between the scattering of point-like particles and the scattering of spheres; this can be treated due to gravitational or electrostatic interactions (if the spheres are charged). No big deal with GR. Unless the question is very very strange ... –  Cedric H. Nov 20 '10 at 19:40
@Cedric H.: What do you think a black hole is ? a discontinuity in a mass distribution ? –  Rajesh D Nov 20 '10 at 19:52
@Rajesh: At first your question was not clear at all... I interpreted by "point mass" a geometrical point affected with a mass. A classical scattering problem like the one of a charged point-like particle. –  Cedric H. Nov 21 '10 at 10:58

## closed as not a real question by mbq♦, Sklivvz♦, Cedric H., Marek, Tobias KienzlerNov 22 '10 at 8:20

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

In the context of classical mechanics, your question is probably ill-formed.

Since point masses have no physical extent, the gravitational force increases without bound as r approached zero, which it will indeed do because they'll only collide when they're superposed.

Infinite force on a finite mass implies infinite acceleration (F = ma) which implies infinite velocity, which is inconsistent with special relativity.

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