From: mikko.levanto@iki.fi   
      
   On 2025-03-27 08:26:11 +0000, Luigi Fortunati said:   
      
   > I have completed the animation of the elastic collision   
   > https://www.geogebra.org/classic/hxvcaphh   
   > and the inelastic one   
   > https://www.geogebra.org/classic/atdrbrse   
   > where, in both cases, I noticed a strange phenomenon.   
   >   
   > In the inelastic collision, body A with mass m_A=1 exerts a force   
   > F_AB=+v on body B, because it increases its speed from vi_B=-v to   
   > vf_B=0.   
      
   In a collision the force is not constant in time. It is initilally   
   sero and finally sero but if it is always zero there is no collision.   
   How the force varies duriong the collision depends on details that   
   are not discussed below. In the special case of zero duration of the   
   collision the force is infinite.   
      
   --   
   Mikko   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)