15.5.2. Four cargo mass m = 1 kg each, connected by a flexible thread, thrown over a fixed block weightless, moving according to the law s = 1,5t2. To determine the kinetic energy of the cargo system at time t = 2 s.

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(Chapter 3 - Dynamics theme - 15.5: The kinetic energy of the mechanical system) from 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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