International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 324
ltant of O E, EF, and EG, and likewiseof A O, BO, and CO. The line EG, parallel to CO, could not be drawnfrom the point O to the right of O E, for in that case it would be opposedin direction to OF; but EG must have the same direction as OF, inorder that the resultant may be opposed to both O T^and… … L O were drawn parallel and equal to O L, and having the same direc-tion, it would represent the effect produced on the body by the com-bined action of the forces A O, BO, CO, and DO. 879. In the last figure, it will be noticed that O 1% R F,F G, G L, and L O are sides of a polygon O E F G L,…
Railroad engineering
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