From: niklas.holsti@tidorum.invalid   
      
   On 2020-10-23 11:01, JF Mezei wrote:   
   > We're always told that perpetual machines are not posisble.   
   >   
   > Yet, matter generates a force (gravity) 7/24 without  input of energy.   
   >  From the various laws of conservation of energy, how is this explained?   
      
   A constant force on a stationary object performs no work and therefore   
   uses no energy.   
      
   A force does work, and so uses or produces energy, only if the object on   
   which the force acts moves -- is pushed or pulled by the force. But a   
   falling object will stop, sooner or later, having converted its   
   potential energy first into kinetic energy and then into other forms   
   (heat) when it goes splat.   
      
   Same principle applies to magnetic and electrical forces, with the added   
   point of changes in one producing the other.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)