Solution of task 15.5.4 from the collection of Kepe OE

Solution of task 15.5.4 from the collection of Kepe OE

15.5.4
A load of mass m = 4 kg, sinking downwards, leads, with the aid of a thread in rotation, a cylinder
Radius R = 0.4 m. The moment of inertia of the cylinder relative to the axis of rotation is I = 0.2 kg · m2.
Determine the kinetic energy of the system of bodies at the time when the speed of the load is v = 2
M / s. (Answer 10.5)