Rigid bar ABCD is loaded and supported as shown. Bars (1) and (2) are unstressed before the load P is applied. Bar (1) is made of bronze [E = 100 GPa] and has a cross-sectional area of 480 mm2. Bar (2) is made of aluminum [E = 70 GPa] and has a cross-sectional area of 960 mm². After the load P is applied, the force in bar (2) is found to be 23 kN (in tension). Determine (a) the stresses in bars (1) and (2). By convention, tensile stresses are positive and compressive stresses are negative. (b) the vertical deflection of point A. The vertical deflection is positive if downward and negative if upward. (c) the load P. P B C 0.8 m 10.3 m 1.1 m 0.5 m 0.5 m (1) Answers: (a) σ₁ = 47.92 MPa 02 = (b) VA = (c) P = 23.96 MPa mm JKN