From: arl_123234@hotmail.com   
      
   On 4/24/19 2:51 AM, Stefan Ram wrote:   
   > "J.B. Wood"  writes:   
   >   
   >> Why does the curvature of space-time give rise to a force/acceleration?   
   >   
   >    When you use the expression "curvature of spacetime",   
   >    it seems that you use the conceptual framework of the   
   >    general theory of relativity.   
   >   
   >    Within this framework, the curvature of spacetime does   
   >    /not/ give rise to a force. Gravity is /not/ a force therein.   
   >   
   >    When there are no electromagnetic forces, all particles   
   >    move on geodesics (even in the presence of energy-momentum).   
   >    A geodesic in curved spacetime is what corresponds best to a   
   >    straight line in non-curved spacetime.   
   >   
   >    See also: arxiv.org/pdf/gr-qc/0103044   
      
   Hello, and I would submit that gravity (in the Newtonian sense) is very   
   much a force - It can impart kinetic energy to a mass.  What we're   
   discussing here is gravity's genesis.  Why does/should it exist just   
   because space-time is curved?  We seem to keep talking past this.  If   
   the answer is we (the physics community) don't know at the moment,   
   that's fine.  Sincerely,   
      
   --   
   J. B. Wood	            e-mail: arl_123234@hotmail.com   
      
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