18.3.23. Determine the moment M module pair of forces, which must be attached to a pulley 3 for uniform lifting cargo weighing 1 900 N. Radii pulleys R = 2r = 40 cm.

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(DYNAMICS, Chapter 18 - The principle of possible displacements, paragraph - 18.3: The principle of possible displacements) of Reshebnik to the collection of short tasks on the theoretical mechanics Kep OE, JA Viba, OP Grapis, JA Svetinysh et al. Publishing Moscow / Graduate School / 1989, 2009, 2012.
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