A rigid bar AB of length L= 66 in. is hinged to a support at A...

 

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A rigid bar AB of length L= 66 in. is hinged to a support at A and supported by two vertical wires attached at points Cand D (see figure). Both wires have the same cross-sectional area (A = 0.0272 in.2) and are made of the same material (modulus E = 30 x 106 psi). The wire at Chas length h = 18 in. and the wire at D has length twice that amount. The horizontal distances are c= 20 in. and d = 50 in. (a) Determine the tensile stresses oc and op in the wires due to the load P= 340 lb acting at end Bof the bar. (b) Find the downward displacement õg at end B of the bar. 2h h C D B L A rigid bar AB of length L= 66 in. is hinged to a support at A and supported by two vertical wires attached at points Cand D (see figure). Both wires have the same cross-sectional area (A = 0.0272 in.2) and are made of the same material (modulus E = 30 x 106 psi). The wire at Chas length h = 18 in. and the wire at D has length twice that amount. The horizontal distances are c= 20 in. and d = 50 in. (a) Determine the tensile stresses oc and op in the wires due to the load P= 340 lb acting at end Bof the bar. (b) Find the downward displacement õg at end B of the bar. 2h h C D B L