14.1.20. On the body of one constant force F = 10 N. Determine the acceleration of the body at time t = 0,5 s, when about him under the influence of internal forces of the system moves the body 2 according to the equation x = cosπt. The masses of bodies: m1 = 4 kg, m2 = 1 kg. The bodies move steadily.

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(Chapter 3 - Dynamics theme - 14.1: on the movement of the center of mass theorem) 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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