13.4.19. Body suspended by a spring with a stiffness coefficient = 700 N / m makes free vibrations of the vertical amplitude of 0.2 m. To define weight if oscillation started from the position of static equilibrium with the initial velocity of 4 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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