The rigid bar of negligible weight is supported as shown in the figure. If W = 104 kN, compute the temperature change of the assembly that will cause a tensile stress of 50 MPa in the steel rod. Use the following data:

The section of a thick beam has the dimensions shown in the figure below. Calculate the section properties lz, ly and Izy (Izy = product of inertia) referred to horizontal and vertical axes through the centroid of the section. Refer to Section 6 in your notes for properties of planed sections. Also determine the direct stress at the point A due to a bending moment My = 55 Nm. (Hint: use Page 7-9 in your notes) Ay A 5 mm 20 mm G 5 mm 5 mm 10 mm