3. Figure 4 shows a horizontal beam ABCD supported by am BE. The beam pin jointed to a rigid wall at A, and arm is pin jointed to a rigid wall at E. The beam carries a load PF at F and PG at G. Other dimensions notation is given in Table 1 and numerical values in FILE-2. (Use E = 200 GPa. v = 0.3). You are required to deduce (determine) the following: (a) Stress and final length in BAR 1. (b) Stress and final length in BAR 2 (c) Stress and final length in BAR 3. (d) Force in the arm. [5 marks] [5 marks] [5 marks] [5 marks] Table 1 PART LENGTH (m) DIAMETER (mm) WEIGHT AB 3.0 L1 =1.40 CD L2 =1.50 AE 2.0 BAR 1 1.0 80 BAR 2 L3 =1.35 60 BAR 3 1.2 D1=54mm PF=54.6kn G PG=22.3kn A B D BAR 3 BAR 1 G BAR 2 ARM F E Figure 4