Solved: The triangular plate ABC is supported by ball-and-socket joints at B and D and
Chapter 3, Problem 3.55(choose chapter or problem)
The triangular plate ABC is supported by ball-and-socket joints at B and D and is held in the position shown by cables AE and CF. If the force exerted by cable AE at A is 55 N, determine the moment of that force about the line joining Points D and B.
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