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  • 9.E: Консервативні сили (вправи)
    https://ukrayinska.libretexts.org/%D1%84%D1%96%D0%B7%D0%B8%D0%BA%D0%B8/%D0%9A%D0%BB%D0%B0%D1%81%D0%B8%D1%87%D0%BD%D0%B0_%D0%BC%D0%B5%D1%85%D0%B0%D0%BD%D1%96%D0%BA%D0%B0/%D0%9A%D0%BB%D0%B0%D1%81%D0%B8%D1%87%D0%BD%D0%B0_%D0%BC%D0%B5%D1%85%D0%B0%D0%BD%D1%96%D0%BA%D0%B0_(Tatum)/09%3A_%D0%9A%D0%BE%D0%BD%D1%81%D0%B5%D1%80%D0%B2%D0%B0%D1%82%D0%B8%D0%B2%D0%BD%D1%96_%D1%81%D0%B8%D0%BB%D0%B8/9.E%3A_%D0%9A%D0%BE%D0%BD%D1%81%D0%B5%D1%80%D0%B2%D0%B0%D1%82%D0%B8%D0%B2%D0%BD%D1%96_%D1%81%D0%B8%D0%BB%D0%B8_(%D0%B2%D0%BF%D1%80%D0%B0%D0%B2%D0%B8)
    Of course, by the symmetry of the situation, there will always be an equilibrium position at the bottom of the semicircle, but, if the string is very strong, this position will be unstable, and, upon ...Of course, by the symmetry of the situation, there will always be an equilibrium position at the bottom of the semicircle, but, if the string is very strong, this position will be unstable, and, upon the slightest displacement, the ring will snap up to a higher position. Whether the position at the bottom of the semicircle will be stable or unstable depends on the relative strengths of the weight of the ring and the tension in the string.