Question

The rod stays in balance. What is the length AB of it? F1 = 10N, F2 = 5N, AO = 1m, OB = X, AB = 1 + x

Answer 1

$M_1=M_2\to 10\cdot1=x\cdot5\to x=2\ (m)$

$AB=1+2=3\ (m)$ . Answer