A load P will be supported by a structure consisting of a rigid bar ABCD, a polymer [E = 2,300 ksi; a = 2.9 × 106/°F] bar (1) and an aluminum alloy [E = 10,000 ksi; a = 12.5 x 106/°F] bar (2), as shown. Each bar has a cross-sectional area of 2.00 in.?. The bars are unstressed when the structure is assembled at 30°F. After a concentrated load of P = 60 kips is applied and the temperature is increased to 100°F, determine the normal force in bar (1). (1) 8 ft 6 ft C 2.5 ft 3 ft 1.5 ft O 6.30 kips O 7.66 kips O 8.23 kips O 5.91 kips O 6.89 kips

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Slope and Deflection

The slope in a deflected beam is described as an angle in radians made by the tangent of the section with the original axis of the beam. The deflection at any point on the axis of the beam is defined as the lateral displacement of the point before and after loading.