The beam shown below is simply supported at C and B, and loaded on an D by concentrated masses of and 3 tonne respectively, draw the shear force and bending moment diagram. (10 marks) 3 tonne Ilonne Bm Bu | 2mL fig. 2 Explain the terms elastic strain energy and resilience (4 marks) U= 1 cx volume of shaft Show that the Strain energy due to torsion is given by. 4 (6 marks) (b) Calculate the strain energy in a bar, 50 mm diameter and 1.5 m long, when it is sublected to a pull of 90 kN. What is the resilience per unit volume? (10 marks)