You maybe right as we only got as far as balancing weights in the 50s, didn't do anything about things balancing under the fulcrum point the teacher told us
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If body is at rest under several forces all acting in the same plain the some of the clockwise moments equal the some of the anti clockwise moments when taken from the same point,

Town: Ashton

Dougie,
Imagine a tight-rope walker carrying a long arched pole with heavy weights at both ends, sagging below his feet. If the combined centre of gravity is below the rope, and he doesn't lose his footing, he can't fall off.
Q.E.D.
In theory anyway. I think. DO NOT TRY THIS AT HOME KIDS! Your Mum's clothes line might not be strong enough!

Town: Pit Pony Parish