23.2.9. The rocket moves forward under the action of only the reactive force. Determine the weight of the missile at the time when its speed is 4200 m / s, if the relative velocity of particles separating vr = 1500 m / s. The initial mass of the rocket is 12 * 103 kg, and the initial velocity V0 = 0. (730)

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(DYNAMICS, Chapter 23 - Dynamics of a point of variable mass, paragraph - 23.2: Tsiolkovsky rocket equation) 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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