Chapter 4, Problem 126P

The combined action of the three forces on the base at O may be obtained by establishing their resultant through O. Determine the magnitudes of R and the accompanying couple M. Assume F1 = 420 lb, F2 = 580 lb, F3 = 410 lb, a = 6.8 ft, b = 2.9 ft, c = 3.3 ft, and 0 = 44°.

Replace the force system acting on the post by a resultant force, and specify its angle from the y axis and where its line of action intersects the post AB measured from point B.

The portion of a bridge truss is subjected to several loads. For the loading shown, determine the location in the r-z plane through which the resultant passes as well as R, the resultant force. + Narrative 3 m 3 m 3 m 3 m 4 m 75 kN 1.5 m 250 kN 3 m 100 kN 120 kN