QUESTION 2 (a) In Figure 2(a), AC is a rigid bar of length L hanging from the ceiling on 2 identical slender rods. A force P is applied at a distance x from A. Show that the deflection of point B is independent of x. A x P B C L/2 L/2 Figure 2(a) (10 marks) (b) The shaft AD of length 3L in Figure 2(b) is fixed at both ends. Two masses of weight W and 2W are suspended from thin rigid discs of radius R that are fixed to the shaft at B and C. Determine the angle of twist at B and C. Use G and ] for the shear modulus and polar moment of area for the shaft AD. A L B L L W Figure 2(b) 2W D (15 marks)