Задача №2.16

Условие

Груз P=20 кН поднимается магазинным краном BAC посредством цепи, перекинутой через блок A и через блок D, который укреплен на стене так, что угол CAD=30°. Углы между стержнями крана: ABC=60°, ACB=30°. Определить усилия Q1 и Q2 в стержнях AB и AC.

Решение




Предыдущая задача №15
К веревке AB, один конец которой закреплен в точке A, привязаны в точке B груз P и веревка BCD, перекинутая через блок; к концу ее D привязана гиря Q веса 100 Н. Определить, пренебрегая трением на блоке, натяжение T веревки AB и величину груза P, если в положении равновесия углы, образуемые веревками с вертикалью BE, равны: α=45°, β=60°.
Следующая задача №17
Два одинаковых цилиндра I веса P каждый подвешены на нитях к точке O. Между ними лежит цилиндр II веса Q. Вся система находится в равновесии. Цилиндры I не касаются друг друга. Определить зависимость между углом α, образованным нитью с вертикалью, и углом β, образованным прямой, проходящей через оси цилиндров I и II, с вертикалью.
Источник: Решебник Мещерского 12 класс
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1.1
1.2
1.3
1.4
1.5
2.1
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2.3
2.4
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3.1
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4.1
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19.1
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20.1
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24.1
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27.1
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28.1
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29.1
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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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38.1
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39.1
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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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56.7
56.9
ПравообладателямПользовательское соглашениеПолитика конфиденциальности • Контакты: e-mail: helplearn@yandex.ru