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Or, to put it another way, relative velocity. There is no absolute frame of reference.
I gather that "canoe" can have umpteen meanings, dependent on context. Very economical!
In case of symmetrical motions, average relative velocity is zero.
Quote from: hamdani yusuf on 12/03/2024 12:11:14In case of symmetrical motions, average relative velocity is zero.?? I don't think you can just claim that separate motions are symmetrical. What do you mean symmetrical? What symmetry?
The asymmetry can then be used to determine absolute frame of reference.
Quote from: pzkpfw on 20/02/2024 21:06:19(Personally, I think the OP is diving off into Twins' Paradox etc, with ever increasing complexity, when they don't really grasp the significance of the basics of relativity. I think the explanations need to get simpler, not more complex.)Perhaps you can point out which basics of relativity I've missed out in my calculations with symmetrical twin travellings?
(Personally, I think the OP is diving off into Twins' Paradox etc, with ever increasing complexity, when they don't really grasp the significance of the basics of relativity. I think the explanations need to get simpler, not more complex.)
If two clocks have identical histories, you'd expect them to show the same time when they re-unite.
if they accelerate equally in opposite directions and then stop, they would appear to an observer at the starting point to be synchronised to one another, but neither could tell the time on the other's clock (or the observer's) simply by looking at his own.