Hello for everyone, , can someone help me with this particulary question.
 I´m  doing a simulation transient of a the linear motor of permanente magnets, so i saw some tutorials about it.  
   so the particulary question is, when i create mechanical set, i have to fill up some kind of parameters, but  i`d  like to know something about them,  where they came from, how can calculate them. 
   The parameters shows in the file attach, for example; like Viscous friction coefficient. 
   Where can a find some information that allow me calculate them
 because i need to be accurate wiht this information before get some results.
 thanks a lot ... 
  <?xml version="1.0" encoding="UTF-8"?>