Shoutbox

Cookie, connecting the chains is NOT the same as adding a 10kg weight to either side. Lets say you connect a 20kg chain to the ends of the other chain (ie: the green chain in your diagrams has a mass of 20kg) this is not evenly distributed to 10kg at each end of the initial chain, like it would if you simply attached a 10kg mass to each end, instead the majority of the 20kg mass of the new chain falls downwards and to the middle, meaning that an extra 20kg of mass is now in effect on the original chain at the point where the two slopes meet.

Anyway, if you can't understand how f= mgh works, I would just stop posting in this thread, since you've mostly posted nonsense, I'm afraid. I mean, three of your four diagrams don't even match the criteria of the experiment(ignoring the absurdity of this random extra chain you've decided to magic up).