There are two thin-walled cylinders. One of them, whose radius is equal to R, rotates with angular velocity w around its axis, and the second is at rest. The cylinders are brought into contact so that their axes of rotation are parallel (Fig. 62). After some time (due to friction), the cylinders begin to rotate without slipping. Find how much energy is converted into heat. The masses of the cylinders are M1 and M2.

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