From: tjroberts137@sbcglobal.net   
      
   On 11/16/17 11/16/17   3:20 AM, John Heath wrote:   
   > There is another issue with centrifugal force that as not been   
   > addressed.   
      
   It has not been addressed because it is not an issue. It is, rather, a   
   confusion on your part.   
      
   > The force is outward from the center however when the string   
   > is cut the direction is at 90degrees to the direction of the force where   
   > the ball spinning when released will move in a straight line forward not   
   > outward. The force felt was outward but when free the direction taken   
   > was at 90 degrees to the force ?   
      
   You are confusing velocity with force.   
      
   Before the string is cut, the force on the ball is radially inward, and   
   its velocity is tangential to the circle around which it travels. For   
   definiteness, let us cut the string when it lies along the positive x   
   axis, with the ball circling CCW from above in the x-y plane. So   
   immediately before the string is cut, the force on the ball is in the -x   
   direction (i.e. toward the center at the origin), and the ball's   
   velocity is in the +y direction (i.e. tangential to the circle).   
   Immediately after being cut, there is no force on the ball, and its   
   velocity remains in the +y direction, and off it flies in the +y   
   direction.   
      
   So there is no "issue". Yes, after the string is cut the ball moves off   
   in a straight line tangential to the circle it followed before the cut.   
   Yes, that circle is perpendicular to the radially-inward force on the   
   ball (before cut).   
      
   Tom Roberts   
      
   --- SoupGate-Win32 v1.05   
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