The wires AB and AC are made of steel. and wire AD is made of copper. Before the lSO-lb
Chapter 9, Problem 9-71(choose chapter or problem)
The wires AB and AC are made of steel. and wire AD is made of copper. Before the lSO-lb force is applied, AB and AC are each 60 in. long and AD is 40 in. long. If the temperature is increased by SO"F. determine the force in each wire needed to support the load. Each wire has a crosssectional area of 0.0123 in2. Take ., = 29(10 3) ksi, Ecu = 17(103 ) ksi, a,1 = 8(10-6)/F, acu = 9.(i()(l0-6)/F.
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