Task id8901
A cylindrical roller with a diameter of 0.6 m and a mass of 300 kg is driven by a person who presses on the handle OA with a constant force F (Fig. 67). The length of AO is 1.5 m, the height of point A above the horizon is 1.2 m. Find the force F at which a person, having walked 2 m, imparts a speed of 0.8 m/sec to the skating rink axis. The mass of the roller is considered concentrated in its rim.
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