8. Use FEM to determine the axial force P in each portion, AB and BC, of the uniaxial bar. What are the support reactions? Assume E — 100 GPa, area of cross sections of the two portions AB and BC are, respectively, 10-4m2 and 2 x 10^4m2, and F = 10,000 N. The force F is applied at the cross section at B.

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