7-12. A two-bar truss supports a weight of W = 750 lb as shown in Fig....

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7-12. A two-bar truss supports a weight of W = 750 lb as shown in Fig. P7.12. The forces F and F satisfy the following system of equations: 0.866 F = F 0.5 F = 750 (a) Write the system of equations in the matrix form AF = b, where F = (b) Find F and F using the matrix algebra method. Perform all matrix computations by hand and show all steps. (c) Find F, and F using Cramer's rule. L. W 30 W Fi 30 Figure P7.12 A two-bar truss supporting a weight for problem P7-12. 7-12. A two-bar truss supports a weight of W = 750 lb as shown in Fig. P7.12. The forces F and F satisfy the following system of equations: 0.866 F = F 0.5 F = 750 (a) Write the system of equations in the matrix form AF = b, where F = (b) Find F and F using the matrix algebra method. Perform all matrix computations by hand and show all steps. (c) Find F, and F using Cramer's rule. L. W 30 W Fi 30 Figure P7.12 A two-bar truss supporting a weight for problem P7-12.