Re: Newton's Gravity

In article <vl0q35$28cau$1@dont-email.me> Luigi Fortunati wrote:

Suppose that body A has mass M=1000 and body B has mass m=1 [[...]]
 
If another unit mass 1 is added to body B, its mass doubles to m=2 and
the force acting between the two bodies also doubles, [[...]]
 
But if the other unit mass is added to body A (instead of body B) the
mass of A will become equal to M=1001 (remaining almost unchanged) just
as the force between the two bodies remains practically unchanged [[...]]
 
Why does the force acting between the two bodies double if we add the
unit mass to body B and, substantially, does not change if we add it to
the mass of body A?

Why not?  Why might we expect the effects of adding mass in one location
(A) to be the same as those of adding mass in a different location (B)?

--
-- "Jonathan Thornburg [remove -color to reply]" <dr.j.thornburg@gmail-pink.com>
   on the west coast of Canada