Example 6.5. Two bars, each of length L and of different materials are each subjected to the same tensile force P. The first bar has a uniform diameter D and the second bar has a diameter D/2 for a length L/4 and a diameter D for the remaining length. Compare the strain E1 energies of the two bars if (a) and (b) E2 E1 = E2. %3D

Q: need help with part b i solved a prior

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