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Newsgroups: sci.physics.relativity
Subject: Re: vis-viva and vis-motrix
From: nospam@de-ster.demon.nl (J. J. Lodder)
Reply-To: jjlxa31@xs4all.nl (J. J. Lodder)
Date: Tue, 17 Sep 2024 13:34:09 +0200
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Ross Finlayson <ross.a.finlayson@gmail.com> wrote:

> Does anybody even bother to think about vis-viva versus vis-motrix
> anymore, with regards to conservation, momentum, inertia, and energy,
> and potential and impulse energy?

Of course not. These are obsolete distinctions,
from a time when energy and momentum conservation was not corectly
understood.
The matter was put to rest by Christiaan Huygens
by showing (for particle collisions)
that momentum conservation and energy conservation
are distinct conservation laws, that are both needed,

Jan


> Is it usually considered at all that momentum and inertia change
> places with respect to resistance to change of motion and rest
> respectively sort of back and forth in the theory since antiquity?
> 
> Several times?