From: g.scholten@gmx.de   
      
   Y Porat wrote:   
      
   > now   
   > did you ever  hear about the   
   >   
   >   
   > ALL **PUSH THEORY ??   
   > iow   
   > at the 'end of the day ' it is always   
   > push not pull !!   
   > --   
   > it took me just BTW   80 YEARS !!...thaT IS  my age ..   
   > to understand for instance   
   > how is our breathing is done ??!!:   
   >   
   > ONLY PUSH !! NOT never PULL !!!!!!..   
      
   What's the difference? According to Newtonian equation of motion   
      
   F = m a   
      
   a force F makes a body undergo an acceleration a. One could say the   
   force F "pulls" the body as well as the force "pushes" the body - there   
   isn't any difference except in wording.   
      
   In GR, a free-falling body is force-free, i.e. F = 0, it just follows   
   its natural geodesic path in spacetime, so it is neither pulled nor   
   pushed.   
      
   When we say that gravity is attractive or that gravity pulls a body, we   
   just describe the effect that two bodies that interact gravitationally   
   tend to approach each other. In Newtonian theory, this means that the   
   direction of the gravitational force on the one body points to the   
   position of the other body, in GR, it means that the bodies influence   
   the curvature of spacetime in that way that the geodesic lines which the   
   bodies follow are bend towards each other.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)