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Problems 5.73 The bar AB has a built-in support at A and is loaded by the 5. fix forces (a (b FB = 2i + 6j + 3k (KN), Fc-i-2j + 2k (KN). (a) Draw the free-body diagram of the bar. (b) Determine the reactions at A. Strategy: (a) Draw a diagram of the bar isolated from its supports. Complete the free-body diagram of the bar by adding the two external forces and the reactions due to the built-in support (see Table 5.2). (b) Use the scalar equilibrium equations (5.13)(5.18) to determine the reactions. P5.73
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