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Консультация № 190830
04.04.2017, 18:48
0.00 руб.
1
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1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос: Материальная точка движется по окружности с нормальной составляющей ускорения an [$8776$] t4. При этом момент силы, действующий на точку относительно центра вращения, выражается степенной функцией времени M [$8776$] tn . Найти значение n.
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Обсуждение
05.04.2017, 07:08
общий
это ответ
Здравствуйте, lana.vanesyan!
Известно, что при движении по окружности
где 
- скорость материальной точки, 
- радиус окружности. Поэтому если 
то 
Для тангенциальной составляющей ускорения будет выполняться соотношение 
Вектор момента силы
на его величину будет влиять только тангенциальная составляющая силы, потому что нормальная составляющая (как и нормальная составляющая ускорения) проходит через центр вращения. Следовательно, 
То есть 
как я понимаю.
Известно, что при движении по окружности
где - скорость материальной точки, - радиус окружности. Поэтому если то Для тангенциальной составляющей ускорения будет выполняться соотношение Вектор момента силы
на его величину будет влиять только тангенциальная составляющая силы, потому что нормальная составляющая (как и нормальная составляющая ускорения) проходит через центр вращения. Следовательно, То есть как я понимаю.
Об авторе:
Facta loquuntur.
Facta loquuntur.
05.04.2017, 07:11
общий
Адресаты:
"По техническим причинам" я использовал знак 
(приблизительно равно) вместо знака пропорциональности.
(приблизительно равно) вместо знака пропорциональности.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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