2. Initially, the rigid member is held in the position shown by three A-36 steel tie rods, each with a cross-sectional area of 125 mm². Then, only rod CD experiences a change in temperature of AT = -50°C. A) Determine the axial force in rod AB (units of KN). B) Determine the axial force in rod EF (units of KN). C) Determine the axial force in rod CD (units of KN). D) What is the magnitude of the angle of tilt of the rigid member (positive value in degrees)? 0.75 m E A-0.5 m- -0.5 m-C 0.75 m F

Fig: 1