1.5 For the figure shown beam AB is 1 m long, supported by a frictionless ball- and-socket joint at point A, and supported by cables attached at point B which is located at (800, 0, 600) mm. The beam supports a load of 3 kN applied at the midpoint. The cables, in turn, are supported at points C and D with coor- dinates, given in millimeters, of (0, 500, 500) and (0, 500, -500), respectively. Determine the support reactions at points A, C, and D. 3 kN D B Problem 1.5 rature on the clutch plate