21.1.7 The decision of the collection (Reshebnik) Kep O
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21.1.7. At the end of the torsion spring 1 with the coefficient of the angular stiffness sφ = 40,000 Nm / rad disk 2 is set to the moment of inertia Iz = 25 kg · m 2 with respect to the axis Oz. The disk makes angular oscillation around the axis Oz. Determine the angular natural frequency.
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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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