15.4.1. fan impeller speed is equal to 90 rev / min. To determine the kinetic energy of the wheels if the moment of inertia with respect to its axis of rotation is 2.2 kg · m2.

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(Chapter 3 - Dynamics theme - 15.4: The kinetic energy of a rigid body) of a collection of short Reshebnik problems 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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