17.3.6. During the oscillation of the body with the masses m1 = 10, m2 = kg and 20 kg move along the horizontal guide, with a certain time acceleration a1 = 20 m / s2 and a2 = 30 m / s2. Identify Module force developed in the spring time A.

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(DYNAMICS, Chapter 17 - The principle of D'Alembert, paragraph - 17.3: kientostatiki method for solid state and mechanical system) 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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