International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 322
of the two forces actingupon the point A. It will be found that the diagonal A Dis vertical, and twice as long z.^ A C ; hence, since A C rep-resents a force of 60 pounds, A D will represent a force of2 X 60, or 120 pounds. Thus, we see that the line A D represents the resultant ofthe two forces A… … FIG. ns. Satisfactory results of this kind will be secured when wehave the proportion A B:A C= !(:«. Example.—If two forces act upon a body at a common point, bothacting away from the body, and the angle between them is HO, what isthe value of the resultant, the magnitude of the two forces being60…
Railroad engineering
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