Hegel, in the preface of the phenomenology calls the concept of mathematics, magnitude; what would the concept of physics?
The Res Extensa of Descartes and Spinoza?
But Liebniz, in an *Essay on Dynamics says:
I have proclaimed elsewhere that there is more to the body than extension - indeed there is something in them that is prior
So, perhaps not; could it be Motion?
He goes to say:
It couldn't be the case that motion is the fundamental category in physics, because motion, when we analyse it, doesn't really exist.
And this by one of the modern founders of this science; thus under what concept or category do we capture this most successfully precise of the exact sciences? Surely not exactness...