4-29. Determine the coordinate direction angles a, ß, y of F, which is applied to the end A of the pipe assembly, so that the moment of F about O is zero. F= 20 lb 8 in. 6 in. -6 in. Prob. 4-29 -y 10 in.

F4-8. Determine the resultant moment produced by the forces about point O. F= 500 N 0.125 m 0.3 m- 4 60° 0.25 m F = 600 N Fr: 6oメsin6e

4-27. Replace the three forces acting on the plate 1 wrench. Specify the magnitude of the force and co moment for the wrench and the point P(y, z) where its of action intersects the plate. Z x A FA = {-80k}lb 12 ft. Z B Prob. 4-27 FB=(-60j] lb 12 ft C Fc-40i) lb

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. Points A and Clie in the y-z plane. If the force exerted by cable CF at C is 96.000 N, determine the moment of that force about the line joining points D and B. 0.2 m 0.7 m 0,6 m D 0.4 m 0.9 m 0.3 m C 0.9 m B 0.6 m 0.35 m 0.4 m 0.6 m The moment of that force about the line joining points Dand Bis N-m.