Ребята нужно с решением. Ракета массой 5000 кг поднимается на высоту 10 км за 20 с. Чему равна сила тяги

Ребята нужно с решением.
Ракета массой 5000 кг поднимается на высоту 10 км за 20 с. Чему равна сила тяги
- Предмет:
  Физика
- Автор:
  rodrigo74
- 5 лет назад

Ответы 1

S=at²/2a=2S/t²=2*10000/20²=50 м/с²Рисуем рисунокРакета,сила тяжести вниз,сила тяги вверх.Ускорение направлено вверх.Пишем основное уравнение динамики(второй закон Ньютона):∑F=ma (Здесь F и а -вектора!)Ось х направим вверх по ускорению! (так проще).В проекции на ось х : - mg +Fт=maНаходим Fт=ma+mg=m(a+g)=5000*(50+10)=3*10^5 НОтвет: 3*10^5 H.
- Автор:
  harleywaters
- 1 год назад
- 6
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Ребята нужно с решением. Ракета массой 5000 кг поднимается на высоту 10 км за 20 с. Чему равна сила тяги

Ответы 1

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Ребята нужно с решением.
Ракета массой 5000 кг поднимается на высоту 10 км за 20 с. Чему равна сила тяги