21.2.10. At what distance l1 is necessary to place two identical springs to both the natural frequencies of small oscillations of a homogeneous non-deformable bar were the same, if the size l = 1 m.

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(DYNAMICS, Chapter 21 - Small oscillations of mechanical systems, par - 21.2: The vibrations of systems with two 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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