From: helbig@asclothestro.multivax.de   
      
   In article , Luigi Fortunati   
    writes:   
      
   > Luigi Fortunati a écrit   
   >> Oliver Jennrich giovedì 27/06/2019 alle ore 19:07:43 ha scritto:   
   >>> The shape of a body that is held together by internal forces is   
   >>> determined by the balance of the external (tidal) force and the   
   >>> internal forces.   
   >>   
   >> Yes, there are the INTERNAL forces that are always present and that do   
   >> not have a privileged direction, so they tend to keep the initial   
   >> spherical shape of the jelly ball (on average).   
   >>   
   >> And there is the EXTERNAL (tidal) force that acts more on the "south"   
   >> part of the sphere than the "north" part which is farther from the   
   >> center of gravity, thus causing an elongation at the poles and a   
   >> crushing at the equator.   
   >>   
   >>   
   >> [[Mod. note -- Yes.  As Oliver Jennrich said, the body's shape   
   >> is determined by the balance of these two forces.   
   >> -- jt]]   
   >   
   > It follows that the presence of an EXTERNAL force during the free fall   
   > in a gravitational field, contrasts with the inertiality described in   
   > the first principle.   
   >   
   > So I explicitly ask: is the free fall in a gravitational field inertial   
   > or accelerated?   
      
   I'm not sure what your question is, but if you are thinking of the idea   
   that "a man falling from a roof feels no force", then this is true   
   actually only in the limit if infinitely small size.  An object of   
   finite size will feel tidal forces (and, of course, any   
   non-gravitational forces present such as surface tension).   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)