From: arl_123234@hotmail.com   
      
   On 4/20/19 10:25 AM, Rich L. wrote:   
   > On Friday, April 19, 2019 at 3:57:47 PM UTC-5, J.B. Wood wrote:   
   >> On 4/18/19 10:48 AM, Rich L. wrote:   
   >>   
   >>>   
   >>> The key to understanding how general relativity explains gravity   
   >>> is to focus on the time metric component, g_00. This is the component   
   >>> that results in the gravitational red shift, which, in simple terms,   
   >>> says that an oscillator at one elevation in a gravitational field   
   >>> will appear to have a lower frequency when viewed from a higher   
   >>> elevation, and conversely will appear to have a higher frequency   
   >>> when viewed from a lower elevation.  (it is incorrect to say that   
   >>> the frequency changes; no matter where the oscillator is located,   
   >>> an observer at the same elevation will always observe the same   
   >>> frequency.)   
   >>>   
   >>>   
      
   Hello, and I think I get that acceleration and gravitational force are   
   equivalent.  Einstein said that and we know the accelerating windowless   
   elevator illustration.  But my question still goes unanswered IMO - Why   
   does the curvature of space-time give rise to a force/acceleration?  The   
   fact that space is warped by a mass and that light waves follow the   
   curvature isn't the issue.  It's why there's a "force" in the first   
   place.  Is it due to the fact that the presence of a mass distorts space   
   and that space (along with objects in it) is being "dragged" towards the   
   distortion? Kind of like particles suspended in a fluid that's going   
   down a drain (but there's no drain - except maybe for a black hole).   
   Sincerely,   
      
   --   
   J. B. Wood	            e-mail: arl_123234@hotmail.com   
      
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