Solve Problem 6.39 for P = 0 and Q = (-900 N)k.

PROBLEM 6.39* The truss shown consists of nine members and is supported by a ball and socket at B, a short link at C, and two short links at D. (a) Check that this truss is a simple truss, that it is completely constrained, and that the reactions at its supports are statically determinate. (b) Determine the force in each member for P = (-1200 N)j and Q = 0.

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0.6 m In 2.25 m 0.6")/ 1.2 m 1.2 m 0.75 m