From: fortunati.luigi@gmail.com   
      
   Sylvia Else giovedì 17/11/2022 alle ore 11:21:02 ha scritto:   
   > On 17/11/2022 9:01 pm, Luigi Fortunati wrote:   
   >> Are tidal forces real or apparent?   
   >>   
   >   
   > That's the kind of question that can lead to fisticuffs in otherwise   
   > polite physics circles.   
   >   
   > They're as real as the gravitational force holding you down to the   
   > ground, except that some would argue that there's no such thing as a   
   > gravitational force, and that what's happening is that you're being   
   > accelerated by the upwards force from the ground.   
   >   
   > So to avoid physical violence in these situations, you need a very   
   > precise definition of real versus apparent.   
   >   
   > That said, tidal forces are not as unreal as the Coriolis force that   
   > appears to be acting on a freely moving object when the observer is in a   
   > rotating frame.   
   >   
   I don't have to give the very precise definition of real strength   
   versus apparent strength because it's in all school books.   
      
   That said, the only clear answer to my question is not to say that   
   "some would argue" one thing and "others would argue" something else.   
      
   The only clear answer is:   
   (1) tidal forces *are* real forces   
   or   
   (2) tidal forces *are* apparent forces.   
      
   One answer excludes the other.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)