14.6.7. The tube rotates around a vertical axis Oz, its moment of inertia Iz = 0,075 kg · m2. On the tube under the action of internal forces of the system moves the ball m Weight m = 0,1 kg. When the ball is on the axis Oz, the angular velocity ω0 = 4 rad / sec. At what distance l is equal to the angular velocity of 3 rad / s?

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(Chapter 3 - Dynamics theme - 14.6: The theorem of change of angular momentum) 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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