20.3.15. Loads 1, 2, 3, where m1 = weight of 12 kg, m2 = 6 kg, m3 = 4 kg are moved in a vertical plane. Choosing coordinates y1 and y2 as a generalized, define the generalized force corresponding to the coordinate y1.

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(DYNAMICS, Chapter 20 - Lagrange equation of the second kind, paragraph - 20.3: Generalized power systems with multiple degrees of freedom) from 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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