I think he means it in the sense that if you take relativistic equations, and substitute infinity in for c (or, more rigorously, take the limit as c goes to infinity), you will get Newtonian equations. Thus the behavior of objects at small speeds is roughly Newtonian, because c is already well on its way to infinity compared to those speeds; conversely, when an object is traveling at a rate of 0.1c, it matters greatly that c is finite.
> conversely, when an object is traveling at a rate of 0.1c, it matters greatly that c is finite.
Not that greatly: the size of most relativistic effects is v²/2c² + O(v^4) which for v = 0.1c is 0.005. I would have used a bigger number for the example, say 0.9c.
I think he means it in the sense that if you take relativistic equations, and substitute infinity in for c (or, more rigorously, take the limit as c goes to infinity), you will get Newtonian equations. Thus the behavior of objects at small speeds is roughly Newtonian, because c is already well on its way to infinity compared to those speeds; conversely, when an object is traveling at a rate of 0.1c, it matters greatly that c is finite.
Upon re-reading, I see that you are probably correct. Thanks!