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DrStupid said:It could but it doesn't.
I thought you said that it doesn't change the physics whether you use 4-vectors or 3-vectors. So Newton may not have used 4-vectors, but it's the same theory, whether you do or not.
DrStupid said:It could but it doesn't.
stevendaryl said:I would trace that difference to the fact that the relationship between clock time (or proper time) and coordinate time is more complicated in SR.
DrStupid said:You can't simply replace Newton's p=m·v by P=m·V and expect that it is still the same definition.
PeterDonis said:Nobody appears to be disagreeing anywhere in this thread on the actual physics--the actual predictions for experimental results. It's all just about how to describe things in ordinary language, and such arguments will never end.
PeterDonis said:it's just a matter of personal preference how you want to express the differences in words or symbols