[Stonius (Markus)]

I'd like to calculate how much weight I'll need to add the the back end of my Dob to counterweight my eyepieces to maintain balance.



Is there a formula for figuring out how much weight to add to one side of a see-saw with a length x and fulcrum at position y that will achieve balance?


Like, a see-saw 1m long, where the fulcrum is at, say 33.333cm and the weight on the long end is 1kg. Will it require 2kg on the shorter end to counterbalance it? 4kg? I've no idea what the mathematics are here. I'm sure some long-bearded greek guy figured it out 2,000 odd years ago, but I don't know his name or the name of the theory he invented.


Many Thanks


Markus