Задача №2.50
Условие
На проволочной окружности ABC радиуса R, расположенной в вертикальной плоскости, помещено гладкое кольцо B, вес которого p; размерами кольца пренебречь. Кольцо посредством упругой нити AB соединено с наивысшей точкой A окружности. Определить угол φ в положении равновесия, зная, что сила натяжения нити T пропорциональна ее относительному удлинению, причем коэффициент пропорциональности равен k. Если через L и l обозначим длину нити соответственно в состоянии растянутом и нерастянутом, то T=k(L-l)/l.Решение
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1.1
1.2
1.3
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2.1
2.2
2.3
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3.1
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4.1
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9.1
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10.1
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12.1
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24.1
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25.1
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26.1
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27.1
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28.1
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30.1
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31.1
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32.1
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33.1
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34.1
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35.1
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37.1
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38.1
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39.1
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41.1
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42.1
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43.1
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44.1
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45.3
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46.1
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47.1
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48.1
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49.1
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53.5
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54.1
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55.2
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