In the sketch below the distances R1 and R2 are measured from the support point. The strings of lengths L1 and L2 are essentially massless. The horizontal bar in the figure will remain horizontal if R1 R2 L2 M1 M 2 O LIM1 = L2 M2 O L1 = L2 and R1 = R2 OR1 M1 = R2 M2 O L1 = 2 42 and M1 and M2 OR1 41 = R2 L2