Solution of the D2 version 11 Dievskaya VA Malyshev IA

Solution of the D2 version 11 Dievskaya VA Malyshev IA

Solution of the D2 B11. In the braking shaft operates a permanent friction torque in bearings M1 = 80 Nm torque resistance caused by magnetic coupling M2 = 60 (1 - e ^ -1,2t). The initial angular velocity of the shaft is equal to w0 = 15 rad / s. The moment of inertia about the axis of rotation is equal to J = 50 kgm2. Determine the angular velocity of the shaft at the time t = 3c.

Additional information:

Right after the payment you receive a link to the archive with the solution of the problem in theoretical mechanics A2 B11 (condition 11) in the test book "theoretical mechanics" Dievskaya VA Malyshev IA 2009 for university students.
The decision is decorated in a format word (typed or hand-written decision in a Word), packed to the archive zip (open on any PC).

After checking the solutions I would be very grateful if you leave your positive feedback.