Lever friction maths..was Keep on filing..

[Richard Brekne]

Hi Danilo

I dont know about the rest of the list, but when I access the archives 
to read posts yours come through as an HTML document which is scrubbed 
and saved via a link.  When I open such links they are so full of HTML 
code that I usually dont bother sorting out the actual text.   I did in 
your case, and looked quickly at what you were doing...but cant say 
whether your math itself was correct or not.  There are a few things 
that happen to friction and springs tho when things are in motion that 
are not the same for the kind of static condition your numbers 
consider.  Go for it tho... i.e. figuring out what numbers to put to 
what situations and why...you'll end up a lot farther in your 
understanding many (if not most) others.

Cheers
RicB