Solution of the D2 B4. By the shaft at rest, a torque M1 = 0.8 Nm. This gives rise to forces which point M2 = 5 cos (pi t) Moment of inertia about the axis of rotation of the shaft is equal to J = 0,1 kgm2. Determine the angular velocity of the shaft after 2.5 seconds after the beginning of the movement.

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