23.1.18. The body of variable mass m = 82 (1 + 4t) moves uniformly in a straight line at a constant force F = 500 N and reactive power. Determine the relative speed vr joining particles. (1.52)

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(DYNAMICS, Chapter 23 - Dynamics of a point of variable mass, paragraph - 23.1: variable-mass system) 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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