Re: Newton's Gravity

Jonathan Thornburg [remove -color to reply] il 01/01/2025 09:08:45 ha
scritto:

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)?

Yes, we *should* expect the same effects if we mean the same thing by
"effects."

I'm talking about masses (causes) and forces (effects): what effects
are you talking about?

Luigi Fortunati