Задача №3.20
Условие
Прямоугольный щит AB ирригационного канала может вращаться относительно оси O. Если уровень воды невысок, щит закрыт, но, когда вода достигает некоторого уровня H, щит поворачивается вокруг оси и открывает канал. Пренебрегая трением и весом щита, определить высоту H, при которой открывается щит.Решение
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1.1
1.2
1.3
1.4
1.5
2.1
2.2
2.3
2.4
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2.55
3.1
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3.4
3.5
3.6
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3.20
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4.1
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4.55
4.56
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4.61
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5.1
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6.1
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9.1
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10.1
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11.1
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12.1
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13.1
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15.1
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16.1
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17.1
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19.1
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20.1
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22.1
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23.1
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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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27.42
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27.44
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27.47
27.48
27.49
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27.55
27.58
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27.63
27.64
27.65
28.1
28.2
28.3
28.4
28.5
28.6
28.7
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29.1
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30.1
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31.1
31.2
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31.25
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31.31
31.32
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31.35
32.1
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32.6
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32.20
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32.30
32.31
32.32
32.33
32.34
32.35
32.36
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32.38
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32.40
32.41
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32.44
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32.46
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32.48
32.49
32.50
32.51
32.52
32.53
32.54
32.55
32.56
32.57
32.58
32.59
32.60
32.61
32.62
32.63
32.64
32.65
32.66
32.67
32.68
32.69
32.70
32.71
32.72
32.73
32.74
32.75
32.76
32.77
32.79
32.80
32.81
32.82
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32.84
32.85
32.86
32.87
32.88
32.89
32.90
32.91
32.92
32.93
32.94
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32.96
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32.100
32.101
32.102
32.103
32.104
32.105
32.106
32.107
33.1
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33.6
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33.22
34.1
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34.5
34.6
34.7
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34.10
34.11
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34.31
35.1
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36.1
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37.1
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37.59
38.1
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38.38
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38.53
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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48.48
48.49
49.1
49.2
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53.5
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54.1
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54.35
55.2
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56.3
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56.9