An elementary treatise on mechanics, embracing the theory of statics and dynamics, and its applications to solids and fluids (1849)
Smith, Augustus William, 1802-1866 · New York, Harper · leaf 145
ple of virtual velocities obtains in a lev-er of any form. Let ACB be the lever be-fore displacement, ACBits position afterward.From A draw Av perpen-dicular to AP, and from B,Bu perpendicular to BQ,produced. Av is the vir-tual velocity of P, and Buthat of Q. Now when the displacements are… … 122 STATICS. or ¥.Av-Q.Bu=0,P.AC. sin. PAC-Q.BC. sin. QBCP BC. sin. QBC as found in Art. 134. Q AC.sin.PAC 200. Prop. The principle of virtual velocities obtains in thesingle movable pulley with cords inclined. Let A be the point wherethe cords produced wouldmeet at the first positionof the pulley,…
Mechanics, Analytic
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