The triangular plate ABC is supported by ball-and-socket joints at B and D and is held in

Question:

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 220 lb, determine the moment of that force about the line joining points D and B.

16 h. Siw 36 in 28 in 21 in 24 in. 14 36 in. 16 in 12 in.