14.1.3. Body mass m = 2 kg is moving on horizontal guides according to the law s = 2t2 + 1. Determine the main unit vector of the external forces acting on the body.

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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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