Задача №2.4

Условие

Два трактора, идущих по берегам прямого канала с постоянной скоростью, тянут барку при помощи двух канатов. Силы натяжения канатов равны 0,8 кН и 0,96 кН; угол между ними равен 60°. Найти сопротивление воды P, испытываемое баркой при ее движении, и углы α и β, которые должны составлять канаты с берегами канала, если барка движется параллельно берегам.

Решение




Предыдущая задача №3
По направлению стропильной ноги, наклоненной к горизонту под углом α=45°, действует сила Q=2,5 кН. Какое усилие S возникает при этом по направлению горизонтальной затяжки и какая сила N действует на стену по отвесному направлению?
Следующая задача №5
Кольца A, B и C трех пружинных весов укреплены неподвижно на горизонтальной доске. К крючкам весов привязаны три веревки, которые натянуты и связаны в один узел D. Показания весов: 8, 7 и 13 Н. Определить углы α и β, образуемые направлениями веревок, как указано на рисунке.
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
2.12
2.13
2.14
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2.33
2.34
2.35
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2.44
2.45
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2.48
2.49
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2.53
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2.55
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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25.1
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26.1
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27.1
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27.55
27.58
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27.64
27.65
28.1
28.2
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29.1
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30.1
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31.1
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31.34
31.35
32.1
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32.4
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32.35
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32.55
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32.61
32.62
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32.64
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32.66
32.67
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32.84
32.85
32.86
32.87
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32.89
32.90
32.91
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32.105
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32.107
33.1
33.2
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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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48.31
48.33
48.34
48.35
48.38
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48.44
48.48
48.49
49.1
49.2
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53.5
53.12
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54.1
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54.32
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54.35
55.2
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55.38
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56.3
56.7
56.9
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