Problem-3 A gondola on a ski lift is supported by two bent arms, as shown in Fig. 3. Each arm is offset by the distance b-180 mm from the line of action of the weight force W. The allowable stresses in the arms are 100 MPa in tension and 50 MPa in shear. If the loaded gondola weighs 12 kN, what is the minimum diameter d of the arms? Fig. 3