From: fortunati.luigi@gmail.com   
      
   Eric Flesch domenica 20/03/2022 alle ore 09:22:48 ha scritto:   
   >> Why does the force of gravity disappear in the free-falling elevator and   
   >> on Earth (which is also in free-fall) does it not disappear?   
   >   
   > If the Earth were in the shape of a homogeneous hollow shell, then you   
   > would indeed free-float within it.   
   >   
   > [[Mod. note -- I think we also need the conditionn "... a homogenous   
   > *spherical* hollow shell.  -- jt]]   
      
   In a hollow and homogeneous spherical shell I would certainly float but   
   the free falls of the lift and the Earth do not occur in any hollow   
   shell.   
      
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