Задача id10337

A body of mass 3 kg lying on a horizontal plane is connected to a vertical wall by an undeformed spring. The spring axis is horizontal, its stiffness is 54 N/m, the coefficient of friction between the body and the plane is 0.3. What minimum speed must be imparted to the body along the axis of the spring so that it returns to the starting point? g = 10 m/s2.

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