Recent content by mutant

"However, as far as I can see, there is no equivalent in the Sun-Earth system to gravity acting downwards on the golf ball." This is where the analogy breaks down: at the first step. A better analogy can be found in Taylor-Wheeler's Space-time Physics, two men walkig along meridians of...

Yes, acceleration (the fact, not the measure of it) is absolut, in the meaning, that there is an experimental way to show, whether the body moves inertial or is accelerating wrt an inertial frame. Similarly: the fact of a motion to be inertial is also absolut. This however does not mean, that...

Allow me please a somewhat longer introduction to reference frames. (At least, as I understand) Everything starts with the intuitive idea of distance. This comes from the intuitive experience, that there exist rigid bodies. A rigid body is something, for which: between any two point of it...

Hi, I am new on this forum, so hello for everyone. Moreover, my mothertongue is not English. So please forgive me, if I misunderstand questions, and use non-correct terminology. I think, Eribons question goes around the fact, whether can it be absolutely decided, if a ref. frame is interial or...