From: fortunati.luigi@gmail.com   
      
   Centrifugal force is an "apparent" force.   
      
   Ok, but I have a doubt and I hope you can clarify it.   
      
   The sling rotates and the hand exerts a real centripetal force on the   
   rope.   
      
   For the third principle, even the rope exerts an equal and opposite   
   force (hence centrifuge) on the hand.   
      
   How is possible that the two opposing forces, one is real and the other   
   apparent?   
      
   --   
      
      
   Luigi Fortunati   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)