Problem Statement A steel shaft 120 mm in diameter is supported in flexible bearings at its ends. Two pulleys, each 500 mm in diameter, are keyed to the shaft. The pulleys carry belts that produce the forces shown. Determine the internal forces on a vertical section through point A. I've been trying to start this problem, but the one thing I cannot figure out are what sort of forces are exerted at the ends of the shaft by the flexible bearings. Also, I'm not sure why the diameter of the shaft would be required since it asks you to calculate the shear and axial forces along with the moment at cross-section A. Any help would be greatly appreciated.