From: fortunati.luigi@gmail.com   
      
   Phillip Helbig (undress to reply) sabato 04/08/2018 alle ore 17:24:04 ha   
   scritto:   
   >> I entered the elevator, I placed an electronic scale on the floor and,   
   >> after starting, when the elevator bought steady speed uphill, I weighed   
   >> myself and the display showed 83.5 kg.   
   >> I repeated the operation during the descent at constant speed and the   
   >> display showed a weight of 83.2 kg.   
   >> Is it a strange result or does it correspond to the theory?   
   >   
   > Everything you observe corresponds to theory, because (in this case), the   
   theory is correct.   
   >   
   > It would be a strange result in the case of weighing while the elevator is   
   moving at a steady or constant speed.  I'm pretty sure that your elevator does   
   not move at a constant speed, at least not for any appreciable length of   
   time.  In both cases,    
   moving up and moving down, it will first accelerate and then decelerate.  (It   
   MUST accelerate then decelerate; it could move at constant speed in between,   
   but probably doesn't since this would, for a given comfortable acceleration,   
   increase the travel    
   time.)   
   >   
   > In fact, the difference between your real weight (i.e. that measured at rest   
   with respect to the Earth) and what you measure in the elevator is an   
   indication of the acceleration.  (Note that many electronic scales do not   
   update the display in real time,   
    but rather display a number once the object has been weighed and not update   
   this afterwards, even if the weight changes, unless one first removes the   
   weight from the scales, resets them, etc.)   
   >   
   >   
   > [[Mod. note -- For a short trip I would expect an elevator to accelerate   
   > and then decelerate.  For a long trip I would expect an elevator to   
   > accelerate until it reaches its design-rated maximum speed, then move   
   > at a roughly constant velocity for a while, then decelerate.   
   > -- jt]]   
      
   I was careful to weigh *after* the initial acceleration and *before* of   
   the final deceleration, both uphill and downhill.   
      
   Furthermore, my electronic scale is very tested.   
      
   Since the experiment is reproducible easily, I invite everyone to repeat   
   it personally in their lifts and to report their results here.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)