An element in plane stress is subjected to stresses o, = -52.7 MPa and Txy = 41 MPa (see figure). It is known that one of the principal stresses equals 28.1 MPa in tension. 41 MPa 52.7 MPa (a) Determine the stress oy. Round to one decimal place. MPа Determine the other principal stress. Round to one decimal place. (b) MPa (c) Show the principal stresses on a sketch of a properly oriented element.

Two steel rods are welded together (see figure);the seam is oriented at angle θ = 50°. The stresses onthe rotated element are σ x1 = 10 ksi,  σy1 = -12 ksi,and τx1y1 = -5 ksi. Find the state of plane stress onthe element if it is rotated clockwise to align the x1axis with the longitudinal axis of the rods.