Consider together the Force/Elongation equations for the two elements and the compatibility equation at the rigid connector C. Together, these two equations will provide you with the relationship between the magnitudes of |F_1| and |F_2|.

Part 3.4 b)

Same hint as for Part 3.4 a). Consider together the Force/Elongation equations for the two elements and the compatibility equation at the rigid connector. Together, these two equations will provide you with the relationship between the magnitudes of F_A and F_B. From these, you can find the two stresses σ_A and σ_B. Note that the final equations for the stresses will not depend on the cross-sectional areas for A and B.

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