The naval architect's and shipbuilder's pocket-book of formulae, rules, and tables and marine engineer's and surveyor's handy book of reference (1884)
Mackrow, Clement · London, C. Lockwood and co. · leaf 152
line Rjoining oc will represent inmagnitude and direction theresultant of the forces P, Pj, Po,and P3. Kote.—Tliis geometrical pro-blem is true whether the forcesact in the same or in different planes.E = resultant.9 = angle made by e with a fixed axis ox. a. «„ a„, Sec. = angles made by the forces… … H . sin e = 2y. tan e= — 2y2x cos e= —i R sm e=^-. R 144 MECHANICAL PRINCIPLES. Fig. 120. 3. To find the re,mlta7it of three forces acting throwpi onepoint and mailing right angles with one another. (Fig. 120.) Let OA, OB, oc represent in magnitiidaand direction the forces x, y, z acting throughone…
