Каковы моменты сил, действующих на рычаг? 1) M1 = F1 · OC, M2 = F2 · OD;
2) M1 = F1 · OD, M2 = F2 · OC;
3) M1 = F1 · DC, M2 = F2 · CD;
4) M1 = F1 · COD, M2 = F2 · OCD;
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