15.1.11 On the shaft of the machine operates the pair forces with the moment M, the variation of which is represented by the graph of M = f (φ). Determine the work done a couple of forces in the first two shafts turn.

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(Chapter 3 - Dynamics theme - 15.1: Work and power capacity) 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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