Задача №2.35

Условие

Воздушный шар, вес которого равен G, удерживается в равновесии тросом BC. На шар действуют подъемная сила Q и горизонтальная сила давления ветра, равная P. Определить натяжение троса в точке B и угол α.

Решение




Предыдущая задача №34
В двигателе внутреннего сгорания площадь поршня равна 0,02 м2, длина шатуна AB=30 см, длина кривошипа BC=6 см. Давление газа в данный момент над поршнем равно P1=1000 кПа, под поршнем P2=200 кПа. Найти силу T, действующую со стороны шатуна AB на кривошип BC, вызванную перепадом давлений газа, если угол ABC=90°. Трением между поршнем и цилиндром пренебречь.
Следующая задача №36
Для сжатия цементного кубика M по четырем граням пользуются шарнирным механизмом, в котором стержни AB, BC и CD совпадают со сторонами квадрата ABCD, а стержни 1, 2, 3, 4 равны между собой и направлены по диагоналям того же квадрата; две равные по модулю силы P прикладываются к точкам A и D, как показано на рисунке. Определить силы N1, N2, N3, N4, сжимающие кубик, и усилия S1, S2, S3 в стержнях AB, BC и CD, если величина сил, приложенных в точках A и D, равна 50 кН.
Источник: Решебник Мещерского 12 класс
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1.1
1.2
1.3
1.4
1.5
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
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2.13
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2.33
2.34
2.35
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3.1
3.2
3.3
3.4
3.5
3.6
3.7
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4.1
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5.1
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6.1
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8.1
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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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14.1
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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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21.2
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22.1
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23.1
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24.1
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24.34
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25.1
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26.1
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26.34
26.35
27.1
27.2
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27.4
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27.6
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27.34
27.35
27.36
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27.48
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27.55
27.58
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27.62
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27.64
27.65
28.1
28.2
28.3
28.4
28.5
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29.1
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30.1
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31.1
31.2
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31.35
32.1
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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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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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55.25
55.38
55.41
55.44
56.3
56.7
56.9
ПравообладателямПользовательское соглашениеПолитика конфиденциальности • Контакты: e-mail: helplearn@yandex.ru