kleinwolf Posted May 13, 2009 Posted May 13, 2009 Suppose we consider a Minkowski diagram of a moving frame O' with speed v towards O We consider a moving particle with speed v1 in O. How to determine and What is the speed in O' ? a) We get co- and contra- variants coordinates. b) we get an angle Can this be decided by the speed addition formula ? (a) implies that even a 1-dimensional speed is a vector, so the norm squared should be co- times contra-variant ?
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