From: fortunati.luigi@gmail.com   
      
   Il giorno luned=C3=AC 14 agosto 2023 alle 08:56:01 UTC+2 Luigi Fortunati ha=   
    scritto:   
   > > > In my animation=20   
   > > > https://www.geogebra.org/m/ez4jk4qm=20   
   > ...   
      
   In terrestrial reference frame, the belt moves at the speed of rotation of =   
   the two Earths: if the Earths rotate fast, the belt moves fast, if they rot=   
   ate slowly, the belt also moves slowly.   
      
   In the spaceship reference frame, if Earth-1 rotates at a different angular=   
    velocity than Earth-2, does the belt adjusts its speed at Earth-1's rotati=   
   on or Earth-2's rotation?   
      
    Luigi.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)