EXAM 217 JM: Mechanics of Materials SPRING 2016 ) The three-bar assembly shown supports the vertical load P. Bars AB and BD are identical, each of length L and cross-sectional area A₁. The vertical bar BC is also of length L, but of area A2. All bars have the same modulus E and are pinned at A, B, C, and D. Determine the axial force in each of the bars. B D