Задача №38.33
Условие
Стремянка ABC с шарниром B стоит на гладком горизонтальном полу, длина AB=BC=2l, центры масс находятся в серединах D и E стержней, радиус инерции каждой лестницы относительно оси, проходящей через центр масс, равен ρ, расстояние шарнира B от пола равно h. В некоторый момент времени стремянка начинает падать вследствие разрыва стержня FG. Пренебрегая трением в шарнире, определить:1) скорость точки B в момент удара ее о пол;
2) скорость точки B в тот момент, когда расстояние ее от пола будет равно h/2.
Решение
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1.1
1.2
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2.1
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2.33
2.34
2.35
2.36
2.37
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2.40
2.41
2.42
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2.44
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2.46
2.47
2.48
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2.55
3.1
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4.1
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4.56
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5.1
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9.1
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10.1
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24.1
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28.1
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31.1
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32.1
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33.1
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37.1
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38.1
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39.1
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40.1
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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
48.5
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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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56.3
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56.9