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A 1.05 m-long rod of negligible weight is supported at its ends by wiresAandBof equal length. The cross-sectional area ofAis 2.00 mm^2 and that ofBis 4.00 mm^2. Young's modulus for wireAis 1.80*10^11 Pa; that forBis 1.20*10^11 Pa. At what point along the rod should a weightwbe suspended to produce a) equal stresses inAandB? b) equal strains inAandB?

stressis [pulling force]/[cross-sectional area] andstrainis the relative strain of the wires: dL/L. Young's modulus is the ration [stress]/[strain], which is constant.

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# Equilibrium problem

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