Problem 270
The three forces shown in Fig. P-270 are required to cause a horizontal resultant acting through point A. If F = 316 lb, determine the values of P and T. Hint: Apply M_R = ΣM_B to determine R, then M_R = ΣM_C to find P, and finally M_R = ΣM_D or R_y = ΣY to compute T.
 

Problem 269
Repeat Prob. 268 is the resultant is 390 lb directed down to the right at a slope of 5 to 12 passing through point A. Also determine the x and y intercepts of the missing force F.
 

Problem 268
The resultant of four forces, of which three are shown in Fig. P-268, is a couple of 480 lb·ft clockwise in sense. If each square is 1 ft on a side, determine the fourth force completely.
 

Problem 267
The Howe roof truss shown in Fig. P-267 carries the given loads. The wind loads are perpendicular to the inclined members. Determine the magnitude of the resultant, its inclination with the horizontal, and where it intersects AB.
 

Problem 266
Determine the resultant of the three forces acting on the dam shown in Fig. P-266 and locate its intersection with the base AB. For good design, this intersection should occur within the middle third of the base. Does it?
 

Problem 265
Compute the resultant of the three forces shown in Fig. P-265. Locate its intersection with X and Y axes.
 

Problem 264
Completely determine the resultant with respect to point O of the force system shown in Fig. P-264.
 

Problem 263
Determine the resultant of the force system shown in Fig. P-263 and its x and y intercepts.
 

Problem 262
Determine completely the resultant of the forces acting on the step pulley shown in Fig. P-262.
 

Problem 260
The effect of a certain non-concurrent force system is defined by the following data: ΣF_x = +90 kN, ΣF_y = -60 kN, and ΣM_O = 360 kN·m counterclockwise. Determine the point at which the resultant intersects the x-axis.