From: fortunati.luigi@gmail.com   
      
   Luigi Fortunati il 23/01/2024 12:46:45 ha scritto:   
   > Mikko il 21/01/2024 14:42:49 ha scritto:   
   >>> The elevator in free fall in the gravitational field is an inertial   
   reference system.   
   >>> Is the elevator in free fall in the magnetic or electric field also an   
   inertial reference system?   
   >>   
   >> That depends on the magnetic and electric properties of the elevator.   
   >   
   > The elevator is metallic, the body in the elevator is the same metal as the   
   elevator.   
   >   
   > The field is generated by an electromagnet.   
   >   
   > Luigi Fortunati   
   >   
   > [[Mod. note --   
   > The general principal is that "free fall" means no non-gravitational   
   > forces are acting.   
      
   An even more general principal is that "free fall" means "fall without   
   obstacles".   
      
   No one can deny that, in the most remote space far from all gravity, a metal   
   elevator falling towards an electromagnet is in "free fall".   
      
   And a metal robot in a metal elevator resting on an electromagnet (without   
   being able to look outside) cannot know if there is a motor that is   
   accelerating the elevator or if there is an electromagnet that is attracting   
   it towards the floor (principle of    
   equivalence).   
      
   Luigi Fortunati   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)