Lu,
You prattle on. Bob McFarland is a Customer Service speacialist, and a crackerjack technician. The quote he gives you is actually quite flawed, but you haven't the engineering background to know it.
In a nutshell, a "free body diagram" (FBD) requires that the object be in an unaccelerated state to study all the true forces on it (I taught Newtonian Physics and had a devil of a time getting this across to budding engineers). Those who put appearant forces due to accelerations onto an FBD are automatically corrected.
The case is like the marble on the merry-go-round I posted above (which I know you don't understand).
Simply said, there is no centrifugal force, there is a centripital acceleration.
Now, I expect you to post at least 75 lines of drivel, and wax on about the Sikorsky Engineer who told you otherwise (he is not an engineer, Lu) and the cousin's uncle's brother who you met in a laundromat.
Doesn't help, you are WRONG. Deal with it.
