15.5.8. Plate 1, weighing 40 kg moves forward in a straight line at a speed v1 = 1 m / sec. The body weight of 10 kg 2 moves relative to the plate progressively from the velocity vr = 0,4 m / s. Determine the kinetic energy of a system of bodies, if the vectors v1 and vr parallel.

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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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