19.2.12. Bodies 1 and 2 - homogeneous discs, masses and radii are equal. Determine the acceleration of the body 3, if its mass m3 = m2 = m1.

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(DYNAMICS, Chapter 19 - The general equation of dynamics, paragraph - 19.2: Application of general dynamic equations to describe the motion of a system of bodies) 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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