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 122
e parallel, a—Q and „ W+w Cor. 3. If a=90°, 2«=180°, or the cord becomes straightand horizontal. In this case -o W+wP=-—=«, 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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