Dievsky V.A. - Solution of task D2 variant 2 (D2-02)

Dievsky V.A. - Solution of task D2 variant 2 (D2-02)

D2-02 Dievskiy

Rotating with an angular velocity ω0 = 2.5 rad / s the rotor of the electric motor
Begins to slow down by forces of aerodynamic resistance, the moment
Which M1 = 15ω, and frictional forces in bearings, the moment of which M2 = 30 N. M.
The moment of inertia of the rotor relative to the axis of rotation is J = 100 kg. M2.
Determine how long the rotor will stop.

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