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QUESTION (30 Marks Figure below shows a pulley system with hanger. Point H located on the cross section of hanger at cross section a-a. (a) Determine total stresses due to couple of forces and moment on an element at point H. [10 Marks! (b) By construct Mohr's circle, determine the following stress state at point H. (1) The principles stresses: (ii) The principle plane; (iii) The maximum shearing stress; (iv) Suggest the new stress element at the point and specific the orientation of this state of stress. (15 Marks (c) Explain the usefulness of Mohr's Circle in material strength analysis and suggest the application of Mohr's circle. Quote any references. 15 Marks 0.4 m 106m+ 0.6 m 0.2 m 0.2 m a 0.7 kN 0.7 kN mm 25 mm 75 mm Smum - 50 mm Cross-section for a