The figure shows a four-bar linkage with external forces applied at points B and C. Draw a free-body Figure P11.9 RAO2 = 4 in, RCA = 14 in, RO4O2 = 14 in, RCO4 = 10 in, RDO4 = 7 in, RBA = 14 in, and RBC = 8 in.

diagram of each link, and show all the forces acting on each. Find the torque that must be applied to link 2 to maintain static equilibrium at the posture shown.

Figure P11.10 RAO2 = 75 mm, RCA = 300 mm, RO4O2 = 400 mm, RCO4 = RBA = 200 mm, and RBC = 150 mm.