Problem 2. A steel bar AD (see figure) has a cross-sectional area of 258 mm² and is loaded by forces P₁ = 12 kN, P2=8 kN, and P3 = 5.8 kN. The lengths of the segments of the bar are a =1.52 m, b = 0.61 m, and c= 0.91 m. (a) Assuming that the modulus of elasticity E=207 GPA, calculate the change in length 5 of the bar. Does the bar elongate or shorten? (b) By what amount P should the load P3 be increased so that the bar does not change in length when the three loads are applied? B P₁ C P₂ D

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.