Quiz 3 Tues - by the load. I L--J 2~=O I ? '\ r:. . (?---+...

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\/~ Y -" Name: ___ ~ ____ ~ ____________ EM 319 - Spring 2011 Quiz 3 (30 Minutes) 8 - ' P The tnlSS ABC shown in the figu re is subjected to a horizontal load Pat jOinL B. The two bars are identical with cross-sectional area A and modulus of elasticity E. II ~\ (a) Determine the strain energy U of t he truss if the angle f3 = 60¢. ~ f3/ \\ ,,J \p (b) Delennille the horiwntal displacem ent 15 8 of jOint B by equating thc strain AI~--L ~, ~,\~ energy of the truss to the work done
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