Comment on 'The pedagogical value of the four-dimensional picture: I. Relativistic mechanics of point particles'

摘要

A deductive approach to the relativistic law of motion presented by Kosyakov (2014 Eur. J. Phys. 35 025012) is critically analysed. We point out that the Kosyakov argumentation is flawed and ineffective. On the other hand we show how an implicit assumption made by the author could be used to perform a successful reasoning. Also, another method to derive the relativistic equation of motion, in terms of Lorentz-invariant three-vectors, is recalled.