XPost: sci.math   
   From: relativity@paulba.no   
      
   Den 14.11.2025 13:37, skrev Maciej Woźniak:   
   > On 11/14/2025 12:15 PM, Paul.B.Andersen wrote:   
   >>   
   >> Any particular reason why you snipped the following?   
   >>   
   >> I will elaborate.   
   >> In SR/GR "proper acceleration" is the acceleration measured   
   >> in the rest frame (Momentarily co-moving inertial frame).   
   >> So there is no velocity to derivate, and the proper acceleration is as   
   >> explained above.   
   >>   
   >> In GR, the acceleration is what an accelerometer shows.   
   >   
   >   
   > And a shark is what eats grass - because I have   
   > a theory of sharks eating grass. Why not?   
   > Why would acceleration be - the change of   
   > speed in time? That it should be is an obvious   
   > common  sense prejudice, refuted by a mumbling   
   > idiot and zillions of experiments.   
   >   
   >   
      
   Why are you responding to a post when you address nothing in it?   
      
   Try again?   
   Or are you admitting that the following is beyond your abilities?   
      
   -------   
      
   In SR/GR "proper acceleration" is the acceleration measured   
   in the rest frame (Momentarily co-moving inertial frame).   
   So there is no velocity to derivate, and the proper acceleration is as   
   explained above.   
      
   According to GR the proper acceleration of the satellite   
   is a = F/m where m is the mass of the satellite and F is the force   
   acting on it. Since no force is acting on an object in free-fall,   
   the proper acceleration of the satellite is zero.   
      
   According to GR the proper acceleration of an object on the ground   
   is 9.81 m/s² upwards.   
      
   In GR, the acceleration is what an accelerometer shows.   
   An accelerometer in free-fall  will show zero acceleration,   
   an accelerometer on the ground will show 9.81 m/s² acceleration   
   upwards.   
      
   Why do you think accelerometers show what GR says,   
   and not what your common sense say it should show?   
      
   Could it be that GR is more in accordance with   
   the laws of nature than is your prejudiced common sense?   
      
      
   --   
   Paul   
      
   https://paulba.no/   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)