The horizontal shaft shown in the figure carries two belt pulleys (smaller radius is 80mm, bigger radius is 150 mm) and transmits a power P = 250W at the rotational speed of 1989 rpm. The yield strength of the material is 325 MPa. Determine the diameter of the shaft with a factor of safety 5,0. the angle 0 = 45 300 mm 250 mm 200 mm 65 N 80 mm 80 N 150 mm B 58 N T