An elementary treatise on mechanics, embracing the theory of statics and dynamics, and its applications to solids and fluids (1868)
Smith, Augustus W. (Augustus William), 1802-1866 · New York : Harper · leaf 122
e parallel, a=0 and W+m;• Jl— z—. Cor. 3. If a=90°, 2a=180°, or the cord becomes straightand horizontal. In this case n W+w or the power must be infinite. In other words, no power canreduce the cord to a horizontal straight line while the weightis finite. 159. Of the various combinations of pulleys… … The annexed figure represents this system.Neglecting friction, the tension t of the cordis the same throughout, and equal to P. Theweight W and the weight of the lower blockw are sustained by the tensions of the severalcords at the lower block. Hence, if n be thenumber of cords at this…
Mechanics, Analytic
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