From: relativity@paulba.no   
      
   Den 20.01.2026 19:35, skrev Ross Finlayson:   
   > On 01/20/2026 05:54 AM, Paul B. Andersen wrote:   
   >>   
   >> You are standing on the floor in a small room   
   >> without windows with an accelerometer fixed to the wall.   
   >> The accelerometer shows that it is accelerating   
   >> in the direction which to you is upwards.   
   >>   
   >> If the accelerometer shows that the acceleration   
   >> is constant 1g, then there is no way you can   
   >> decide whether you are stationary at the ground,   
   >> or if you are accelerating at 1g in a spaceship.   
   >>   
   >> If the accelerometer shows that the acceleration   
   >> is changing with time, then you know that you are   
   >> in a spaceship.   
   >>   
      
   The following is obviously not a response to my post above.   
      
   >   
   > As the elevator rises, according to inverse square,   
   > either the force is constant or acceleration is constant,   
   > not both.  I.e. the force decreases or acceleration   
   > increases as the elevator rises, since distance increases.   
      
   Are you trying to say that if the force on an object   
   is constant, then its proper acceleration is not constant?   
      
   < snip>   
      
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   Paul   
      
   https://paulba.no/   
      
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