4.47 A rigid bar is hinged at C as shown in Figure P4.47. The modulus of elasticity of bar A is E = 100 GPa, the cross-sectional area is A = 15 mm², and the length is 1.2 m. Determine the applied force F if point B moves to the left by 0.75 mm. B 1.25 m Rigid C D 2.5 m A Figure P4.47