Riddle me this batman: If you don't understand what is going on in the first part (a free body diagram would help you a lot) then how can you generate a thought experiment in second part? How can you conceive to progress from A to B without the foggiest understanding of A itself? Moreover, you...
I think the easiest way to explain this is that power in equals power out. The force applied to the drive gear (be it a pinion or gear) will be proportional to the forces applied to the driven gear such that the power you put into the system equals the power out of the system.
Are the forces...