Van Nostrand's eclectic engineering magazine . the load P mild pass through F, the pointof intersection of the tangents. If the di-rection and amount of P be known, lay offF G to represent it. Then, as above ex-plained, N F = pull at A and N G = pull at B. Suppose, on the other hand, we assumethe pulls at A and B to be equal, we lay ott*on the two tangents (Fig. 4), equal lengths,F S and F N, to represent these equal pulls,and upon them construct a F G gives the magnitude and direc-tion of the resultant of the load that mustbe put on the cord to produce the givenpulls. A cor
Van Nostrand's eclectic engineering magazine . the load P mild pass through F, the pointof intersection of the tangents. If the di-rection and amount of P be known, lay offF G to represent it. Then, as above ex-plained, N F = pull at A and N G = pull at B. Suppose, on the other hand, we assumethe pulls at A and B to be equal, we lay ott*on the two tangents (Fig. 4), equal lengths,F S and F N, to represent these equal pulls,and upon them construct a F G gives the magnitude and direc-tion of the resultant of the load that mustbe put on the cord to produce the givenpulls. A cord is in equilibrium when it isbalanced under the load applied. Changethe distribution of the load and the cord Fiof. at once charges shape and assumes theform necessary to equilibrium under thenew load. Thus, if P (Fig. 5) equals the direction ofthe resultant of the new load on the cordfrom the horizontal point A to the point ofsupport B, draw the tangent A F, until itmeets the direction of the load P, at F ;then draw F B. The cord A B will haveso changed its form that F B (Fig. 5) willnow be the direction of the tangent at B. Fig. 5.
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Keywords: ., bookcentury1800, bookdecade1860, bookpubl, booksubjectengineering
