Beta, pehle toh unke weight distances ka dono taraf se moment nikaal ke barabar karo. Par yaad rakhna, metre rule khud ka weight bhi ek load hai — uske centre of gravity ka bhi moment lena padega, chahe pivot kahi bhi ho. Maine Kota mein itne bachche padhaye hain ki yeh chhuth jata hai, aur phir poora sum galat ho jata hai.
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