Задача №8.12

Условие

Ременный шкив CD динамо-машины имеет радиус 10 см; размеры вала AB указаны на рисунке. Натяжение верхней ведущей ветви ремня T1=100 Н, нижней ведомой T2=50 Н. Определить вращающий момент M и реакции подшипников A и B при равновесии системы, пренебрегая весом частей машины; (P,P) — пара, образуемая силами сопротивления.

Решение




Предыдущая задача №11
Круглая пластинка, весом которой пренебрегаем, покоится в горизонтальном положении, опираясь центром на острие O. Не нарушая равновесия, по окружности пластинки разместили грузы: P1 веса 1,5 Н, P2 веса 1 Н и P3 веса 2 Н. Определить углы α и β.
Следующая задача №13
На горизонтальный вал, лежащий в подшипниках A и B, действуют: с одной стороны вес тела Q=250 Н, привязанного к шкиву C радиуса 20 см посредством троса, а с другой стороны вес тела P=1 кН, надетого на стержень DE, неизменно скрепленный с валом AB под прямым углом. Даны расстояния: AC=20 см, CD=70 см, BD=10 см. В положении равновесия стержень DE отклонен от вертикали на угол 30°. Определить расстояние l центра тяжести тела P от оси вала AB и реакции подшипников A и B.
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
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3.1
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3.4
3.5
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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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19.1
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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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28.1
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29.1
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30.1
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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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37.1
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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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55.41
55.44
56.3
56.7
56.9
ПравообладателямПользовательское соглашениеПолитика конфиденциальности • Контакты: e-mail: helplearn@yandex.ru