23.1.19. The body of variable mass m = 15 + 160t moves at a constant force F = - 250 H and reactive power. To determine the time when the body acceleration is 10 m / s2, if the relative speed vr accession particles = 5 m / s. (0.563)

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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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