Figure 1 shows a hollow shaft of 15 cm external diameter and 8 cm internal diameter. At its free end a pulley of 50 cm diameter is rigidly fixed. A force of 25 kN is applied tangential to the pulley as shown in the figure. Determine the principal stresses and the absolute maximum shear stress at point A, located 100 cm from the free end and at the top of shaft surface.
