1. For the given state of stress, determine the following using Mohr's circle: a) the principal planes, b) the principal stresses, c) sketch the orientation of the planes of principal stresses, d) the planes of maximum shearing stress, e) the maximum and minimum shearing stresses, f) sketch the orientation of the planes of maximum and minimum shearing stresses, g) the normal and shearing stresses after the element has rotated through 40 counterclockwise. 10 MPa 40 MPa 50 MPa