Thanks for the nice comment! :)

Well I know quite a number from things in this article... For the first time I could understand your articles

The reason is that for once, the physics requirements are Newtonian mechanics and that's it. This helps a lot to write something simpler :)

People don't really pay attention to that when they study classical mechanics, and this is fine as the difference is tiny. It is better not to try to confuse our young students and leave this for a later stage in their studies. ^^