Задача №5.35
Условие
Для опускания грузов употребляется ворот с тормозом, изображенный на рисунке. С барабаном, на который намотана цепь, скреплено концентрическое деревянное колесо, которое тормозят, надавливая на конец A рычага AB, соединенного цепью CD с концом D тормозного рычага ED. Диаметр колеса a=50 см; диаметр барабана b=20 см; ED=120 см; FE=60 см; AB=1 м; BC=10 см. Определить силу P, уравновешивающую груз Q=8 кН, подвешенный к подвижному блоку, если коэффициент трения дерева о сталь f=0,4; размерами колодки F пренебрегаем.Решение
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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
2.15
2.16
2.17
2.18
2.19
2.20
2.21
2.22
2.23
2.24
2.25
2.26
2.27
2.28
2.29
2.30
2.31
2.32
2.33
2.34
2.35
2.36
2.37
2.38
2.39
2.40
2.41
2.42
2.43
2.44
2.45
2.46
2.47
2.48
2.49
2.50
2.51
2.52
2.53
2.54
2.55
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3.12
3.13
3.14
3.15
3.16
3.17
3.18
3.19
3.20
3.21
3.22
3.23
3.24
3.25
3.26
3.27
3.28
3.29
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3.31
3.32
3.33
3.34
3.35
3.36
3.37
3.38
4.1
4.2
4.3
4.4
4.5
4.6
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4.8
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4.10
4.11
4.12
4.13
4.14
4.15
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4.17
4.18
4.19
4.20
4.21
4.22
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4.24
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4.32
4.33
4.34
4.35
4.36
4.37
4.38
4.39
4.40
4.41
4.42
4.43
4.44
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4.46
4.47
4.49
4.50
4.51
4.52
4.53
4.54
4.55
4.56
4.57
4.58
4.59
4.61
4.62
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4.64
4.65
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4.73
4.74
5.1
5.2
5.3
5.4
5.5
5.6
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5.34
5.35
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5.41
5.42
6.1
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8.34
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8.43
9.1
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9.20
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10.1
10.2
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11.1
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12.1
12.2
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13.1
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14.1
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15.1
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16.1
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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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23.48
23.49
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23.64
23.65
23.66
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23.70
23.71
24.1
24.2
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24.34
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25.1
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26.1
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26.35
27.1
27.2
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27.4
27.5
27.6
27.7
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27.32
27.33
27.34
27.35
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27.42
27.43
27.44
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27.48
27.49
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27.54
27.55
27.58
27.59
27.60
27.61
27.62
27.63
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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30.6
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30.30
31.1
31.2
31.3
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31.34
31.35
32.1
32.2
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32.33
32.34
32.35
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32.37
32.38
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32.48
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32.50
32.51
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32.53
32.54
32.55
32.56
32.57
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32.59
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32.61
32.62
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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
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32.81
32.82
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32.84
32.85
32.86
32.87
32.88
32.89
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32.91
32.92
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32.97
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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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33.12
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33.22
34.1
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34.31
35.1
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36.1
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37.1
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38.1
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38.33
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38.38
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39.1
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40.1
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41.1
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41.23
42.1
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42.5
42.6
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43.1
43.2
43.3
43.4
43.6
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44.1
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45.3
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45.34
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45.37
46.1
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46.32
47.1
47.2
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47.19
48.1
48.5
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48.12
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48.19
48.23
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48.27
48.28
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48.31
48.33
48.34
48.35
48.38
48.40
48.41
48.42
48.43
48.44
48.48
48.49
49.1
49.2
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49.4
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49.11
49.12
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49.16
53.5
53.12
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53.16
54.1
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54.6
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54.18
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54.32
54.33
54.35
55.2
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55.21
55.25
55.38
55.41
55.44
56.3
56.7
56.9