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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) (6) By construct Mohr's circle, determine the following stress state at point H. (1) The principles stresses; (11) The principle plane; (111) 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. [5 Marks) 0.4 m - 0.6 m 0.6 m m+ a 0.2 m a 0.2 m 0.7 kN 0.7 kN 5 mun 25 mm 1 1 H 75 mm וורן 5 50 mm 7 Cross-section for a -END OF QUESTION PAPER-