The mechanical engineer's pocket-book. A reference-book of rules, tables, data, and formulæ, for the use of engineers, mechanics, and students (1910)
Kent, William, 1851-1918 · New York, J. Wiley & sons · leaf 539
this case the lines Al, 1-2, 2/-3,etc.. form a twisted polygon, that is, one whose sides are not in one plane. Parallelopipedon of Forces. — If three forces acting on a point berepresented by three edges of a parallelopipedon which meet in a commonpoint, their resultant will be represented by the…
Mechanical engineering
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