International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 325
d lastlines will be the closing sides of the polygon ; mark it oppositein direction to that of the other forces around the polygoji,and it will be the resultant of all the forces. Example.—If five forces act upon a body at angles of 60% 120% 180,240°, and 270°, towards the same point, and their…
Railroad engineering
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