Question 4: The stresses at a point are shown on the element a) Using the stress transformation equations, determine the principal stresses and the absolute maximum shear stress. b) Using the Mohr's circle, determine the principal stresses and the absolute maximum shear stress. c) Draw the orientation and the stress state corresponding to the maximum principal stresses, clearly showing the principal directions. d) Sketch the orientation and stress state for the maximum principal shear plane. e) Determine the maximum in-plane shear stress. Figure 4