Re: vis-viva and vis-motrix

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?