15.2.7. The tube 1 rotates uniformly with angular velocity ω = 2 rad / s around the axis AB. Inside the tube is moving the ball 2 mass m2 = 0,5 kg. To determine the kinetic energy of the ball at the moment when, at a distance l = 0,5 m from the axis has a relative velocity vr = 0,2 m / s.

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(Chapter 3 - Dynamics theme - 15.2: The kinetic and potential energy of a material point) 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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