For the linkage in the posture shown, an external torque T14 = 50k in lb is

For the linkage in the posture shown, an external torque T14 = −50kˆ in · lb is acting on link 4 about O4, and a horizontal force FC is acting at point C on link 3 to hold the linkage in static equilibrium. Assume that gravity is acting into the plane, and the effects of friction can be neglected.

(a) Draw free-body diagrams of Figure P11.34 RO4O2 = 2ˆi−0.864ˆj in, RAO2 = 2.6 in, and RCA = 6 in.

links 2, 3, and 4.

(b) Determine the magnitudes, directions, and locations of all internal reaction forces.

(c) Determine the magnitude and direction of the external force acting at point C.