Задача id16169

On the right pan of a large equal-arm lever scale stands a person of mass m, who is balanced by a load placed on the other pan. A rope is tied to the middle of the right shoulder of the scale at point C (Fig.). Will the balance be upset if a person standing on a scale begins to pull the rope with a force F at an angle a to the vertical? The length of the balance beam is 2l.

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