Two steel wires and a copper wire support a load of \(50 \mathrm{kN}\) as shown in Fig. 13.51. The diameter of steel wire is \(20 \mathrm{~mm}\) and that of copper wire \(15 \mathrm{~mm}\). If \(E_{s}=200 \mathrm{GPa}\) and \(E_{c}=100 \mathrm{GPa}\), calculate the stresses induced in the wire.

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Steel 50 kN Cu 1.5 m Fig. 13.51 Steel 2 m