Задача №8.40
Условие
Картина в раме, имеющей форму прямоугольника ABCD, подвешена на вертикальной стене при помощи шнура EKF, надетого на крюк K так, что край AB горизонтален; точки E, F — середины сторон AD и BC. Картина наклонена к стене под углом α=arctg(3/4) и опирается на два гвоздя L и M, вбитых в стену, причем AL=MB. Размеры картины: AB=60 см, AD=75 см; вес картины 200 Н и приложен в центре прямоугольника ABCD; длина шнура 85 см. Определить натяжение T шнура и давления на гвозди L и M.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
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2.10
2.11
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2.31
2.32
2.33
2.34
2.35
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2.37
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2.39
2.40
2.41
2.42
2.43
2.44
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2.46
2.47
2.48
2.49
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2.53
2.54
2.55
3.1
3.2
3.3
3.4
3.5
3.6
3.7
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3.11
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3.21
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4.1
4.2
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4.55
4.56
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4.59
4.61
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4.74
5.1
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6.1
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8.43
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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15.1
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16.1
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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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23.71
24.1
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25.1
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26.1
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27.1
27.2
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27.4
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27.40
27.41
27.42
27.43
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27.47
27.48
27.49
27.50
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27.55
27.58
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27.61
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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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30.30
31.1
31.2
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31.32
31.33
31.34
31.35
32.1
32.2
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32.5
32.6
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32.16
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32.18
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32.20
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32.29
32.30
32.31
32.32
32.33
32.34
32.35
32.36
32.37
32.38
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32.44
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32.50
32.51
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32.53
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32.55
32.56
32.57
32.58
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32.62
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32.64
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32.66
32.67
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32.69
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32.72
32.73
32.74
32.75
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32.81
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32.86
32.87
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32.89
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32.91
32.92
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32.102
32.103
32.104
32.105
32.106
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
48.6
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48.31
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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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54.18
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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