Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 304
E. We shall see further on the signifi- In Fig. 12 (b) we have the forces P,_6.. cance of this area, or of this product — so acting in various directions and at dif- much is clear, that a couple (or infinitely ferent points of application. P2 and Ps small, infinitely distant force) is com- form a… … area of the triangle or value of the pro- in the opposite direction, from 0 to 5, it duct to which it is proportional, is replaces the forces. We have, therefore, only to find the known. The couple itself can be re- position of the resultant in the plane of placed by any two parallel equal and op-…
Engineering
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