(a) Find the horizontal deflection at joint B produced by the 40-kip load in Figure P8.14....

(a) Find the horizontal deflection at joint B produced by the 40-kip load in Figure P8.14. The area of all bars is shown on the sketch of the truss; E = 30.000 kips/in. ². (b) To restore joint B to its initial position in the horizontal di­rection, how much must bar AB be shortened? (c) If the temperature of bars AB and BC increases 80°F, determine the vertical displacement of joint C. α_t = 6.5 × 10⁻⁶ (in. /in. )/°F. The rocker at support A is equivalent to a roller.

Figure P8.14: