Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 209
Fig. 380. … Fig. 881. MECHANICS. 193 when it becomes equal to the sum of the forces at the ends, the two, to balance it,must pull directly against it, bringing the ends of the rope together, and acting as paral-lel forces. Between the smallest force and the largest that can be exerted at the centreand maintain…
Mechanical drawing
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