Задача №36.11

Условие

Из наконечника пожарного рукава с поперечным сечением 16 см2 бьет струя воды под углом α=30° к горизонту со скоростью 8 м/с. Определить силу давления струи на вертикальную стену, пренебрегая действием силы тяжести на форму струи и считая, что частицы жидкости после встречи со стеною приобретут скорости, направленные вдоль стены.

Решение




Предыдущая задача №10
Сохранив условие предыдущей задачи, определить путь s, который пройдет тележка B по платформе A с момента начала торможения до полной остановки, и время торможения τ, если считать, что при торможении возникает постоянная по величине сила сопротивления F. Указание. В дифференциальном уравнении движения тележки использовать соотношение Mv+m(u+v)=const, где u и v — переменные скорости.
Следующая задача №12
Определить горизонтальную составляющую N возникающей при движении воды силы давления на опору колена трубы диаметра d=300 мм, по которой течет вода со скоростью v=2 м/с.
Источник: Решебник Мещерского 12 класс
Добавить в избранное
1.1
1.2
1.3
1.4
1.5
2.1
2.2
2.3
2.4
2.5
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2.10
2.11
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3.1
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3.4
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4.1
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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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17.1
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18.1
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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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28.1
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29.1
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30.1
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31.1
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31.35
32.1
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32.107
33.1
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34.1
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35.1
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36.1
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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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48.44
48.48
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49.1
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53.5
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54.1
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54.32
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54.35
55.2
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56.3
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56.9
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