P2 E B C D al2 a/2 Determine FBc the magnitude of the force in member BC, using the method of sections. Assume for your calculations that each member is in tension, and nclude in your response the sign of each force that you obtain by applying this assumption.

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STRENGTH OF MATERIALS (UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS LEGIBLY. NO LONG EXPLANATION NEEDED. ANSWER IN 3 DECIMAL PLACES.)

Apply the method of sections to the analysis of the K-truss depicted in the figure below. Questions: (a) Establish whether the truss is statically determinate. Justify your answer mathematically. (b) Determine the reactions at the supports A and K. (c) Apply cuts 1 and 2 to determine the forces in members DE, QE, and OP and state whether these members are in compression or tension. 1800 lb B A C 1000 lb D | E R O F N 1200 lb Six panels @ 4 ft G M 2000 lb H T L K DO 3 ft 3 ft Problem 2 An antenna on a testing range, together with its supporting structure, weighs 300lb with a mass center at C. Assume that 1/4 of the weight is supported by each of the pins at A and B that connect the structure to the truss tower. (The other half is carried by the pins on an identical truss behind the one in the figure.) Questions: (a) Establish whether the truss is statically determinate. Justify your answer mathematically. (b) Compute the horizontal components of the pin reactions at A and B on the…