13.4.20. Body weight m = 0.3 kg is suspended from the spring and makes available to vertical vibration amplitude of 0.4 m. To determine the spring rate coefficient, when oscillation started from a static equilibrium position with an initial velocity of 3 m / s.

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(Chapter 3 - Dynamics theme - 13.1: Free undamped vibrations) from 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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