15.3.13. On an inclined plane down without initial speed the body mass m = 1 kg. To determine the kinetic energy of the body at the time when it has passed a path equal to 3m, if the coefficient of sliding friction between the body and the inclined plane f = 0,2.

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(Chapter 3 - Dynamics theme - 15.3: The theorem of change of kinetic energy of the material point and rigid body in translation) 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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