1. The problem statement, all variables and given/known data 1. A steel bar 375mm long is machined to give a diameter of 75mm for the first 175mm length, a diameter of 45mm for the next 100mm length and a diameter of 37mm for the final 100mm length. Determine: (i) The total extension of the bar when it’s subjected to an axial tensile load of 84 kN. (ii) The tensile stress in each portion of the bar. Assume E = 200 GN/m2 2. Relevant equations 3. The attempt at a solution can this be solved by working out each part as if it were 3 seperate bars ?