Problem 2.4-12A rigid bar of weight W±800 N hangs from three equallyspaced vertical wires (length L±150 mm, spacing a±50 mm): two of steeland one of aluminum. The wires also support a load Pacting on the bar. Thediameter of the steel wires is ds±2 mm, and the diameter of the aluminum wireisda±4 mm. Assume Es±210 GPa and Ea±70 GPa.(a) What load Pallowcan be supported at the midpoint of the bar(x±a) if theallowable stress in the steel wires is 220 MPa and in the aluminum wire is80 MPa? (See figure part a.)(b) What is Pallowif the load is positioned at x±a/2? (See figure part a.)(c) Repeat (b) above if the second and third wires are switchedas shown in figurepart b.(a)xaaPRigid barof weight W
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