13.5.18. The equation of motion of a material point is x = t-0,05t (0,3cos4t + 0,5sin4t). In order to express the equation of motion in the form x = Ae-ntsin (k1t + a) determine the value of A.

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(Chapter 3 - Dynamics theme - 13.1: Free damped oscillations) 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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