1. A motor attached to the shaft at O causes the arm OA to rotate over the range 0 () 180°. The un- stretched length of the spring is 0.65 m, and it can support both tension and compression. If the net moment about O must be zero, determine and plot the required motor torque M as a function of ().
2. The tension T in cable AB is maintained at a constant value of 120 N. Determine the moment MO of this tension about point O over the range 0 () 90°. Plot the x-, y-, and z-components of MO as functions of ().
