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Консультация № 197523
04.01.2020, 20:04
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
Воздушный шарик привязан к нити, которая выдерживает силу натяжения 5Н. На шарик действует вертикальная архимедова сила величиной 3 Н. Начинает дуть горизонтальный ветер, создающий силу сопротивления F=kV. При какой скорости ветра нить порвётся? Коэффициент пропорциональности k=0,4 Нс/м.
Решить могу, только пренебрегая силой тяжести: тогда все просто... Я так понимаю, решить, не пренебрегая ей, нельзя? Или можно?
Воздушный шарик привязан к нити, которая выдерживает силу натяжения 5Н. На шарик действует вертикальная архимедова сила величиной 3 Н. Начинает дуть горизонтальный ветер, создающий силу сопротивления F=kV. При какой скорости ветра нить порвётся? Коэффициент пропорциональности k=0,4 Нс/м.
Решить могу, только пренебрегая силой тяжести: тогда все просто... Я так понимаю, решить, не пренебрегая ей, нельзя? Или можно?
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