Solution of the A2 B2. Rotates with angular velocity w0 = 2,5 rad / s, the rotor of the motor starts to decelerate the forces of aerodynamic resistance, the moment where M1 = 15w, and frictional forces in the bearings, which are currently M2 = 30 Nm. The moment of inertia about the rotational axis J is = 100 kgm2. Determine how long the rotor stops.
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