Text-book of general physics, for the use of colleges and scientific schools (1899)
Hastings, Charles Sheldon · Boston: Ginn & company · leaf 93
es may have.To prove this propo-sition, suppose thatforces Fv Fv • • • Fnare applied to thebody at points x^z^ and let the anglewhich the commondirection of theforces makes with the X axis be called a, that with the Y axis /3, and thatwith the Z axis 7. Denote the resultant of the forces byM; then… … Fig. 55. C EX TEE OF PAEALLEL FOECES. 83 Let x. y, s, be a point in the line of application of theresultant. * The sum of all the components parallel to the X axis is (8) R COS a = F1 COS a -\- F2 COS a-J- ■ • ■ _Fn COS a;similarly, for the Y axis, (9) i? cos (3 = F1 cos /5 + F2 cos /8 -f • • •…
Physics
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