20.3.13. On the plates 1 and 2, whose masses m1 = m2 = 10 kg, are sizgy F1 = 50 and F2 = H 30 N. Define a generalized force corresponding to the coordinate x1 in the coefficient of friction between all surfaces f = 0,15.

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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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