21.1.17 The decision of the collection (Reshebnik) Kepe
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21.1.17. The vibrations of the mechanical system described by the differential equation 9q + 4q = 2sin 2t, where q - the generalized coordinate. Whether forced oscillations of a mechanical system to commit in phase with the driving force?
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(DYNAMICS, Chapter 21 - Lagrange equation of the second kind, paragraph - 21.1: The vibrations of systems with one degree of freedom) 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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