Solution of task 17.1.24 from the collection of Kepe OE

Solution of task 17.1.24 from the collection of Kepe OE

17.1.24
The tube rotates about a vertical axis with a constant angular velocity ω = 1 rad / s under the action of a pair of forces with a moment M. Inside the tube, a material point with mass m = 0.1 kg moves. At the time when t = 0.2 m and the relative velocity of the point vr = 2 m / s, determine the moment M