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Консультация № 200591
07.04.2021, 16:44
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2
1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Частица движется так, что ее радиус-вектор зависит от времени по закону (на фото)
Через сколько секунд ускорение частицы окажется перпендикулярной оси y, если с. А = 3 м,
В = 5 м, ω = п/2 рад/с
.а) 0,016 с; б) 0,216 с; в) 0,416 с; г) 0,616 с; д) 0,816 с
Частица движется так, что ее радиус-вектор зависит от времени по закону (на фото)
Через сколько секунд ускорение частицы окажется перпендикулярной оси y, если с. А = 3 м,
В = 5 м, ω = п/2 рад/с
.а) 0,016 с; б) 0,216 с; в) 0,416 с; г) 0,616 с; д) 0,816 с
Обсуждение
07.04.2021, 21:19
общий
это ответ
Здравствуйте, Дмитрий!
Предлагаю Вам следующее решение задачи.
Дано:
-- закон изменения радиус-вектора частицы от времени.
Определить:
-- момент времени, в который вектор ускорения частицы окажется перпендикулярным оси 
Вектор ускорения частицы окажется перпендикулярным оси
в тот момент времени, когда его проекция на ось будет равна нулю, то есть будет выполнено условие 
откуда получим
Если считать, что движение началось в момент времени
то искомыми являются значения 
с и 
с.
Ответ: с и с.
Среди предложенных Вами ответов моему решению соответствует вариант д.
Предлагаю Вам следующее решение задачи.
Дано:
-- закон изменения радиус-вектора частицы от времени.Определить:
-- момент времени, в который вектор ускорения частицы окажется перпендикулярным оси Решение
Вектор ускорения частицы окажется перпендикулярным оси
в тот момент времени, когда его проекция на ось будет равна нулю, то есть будет выполнено условие откуда получимЕсли считать, что движение началось в момент времени
то искомыми являются значения с и с.Ответ:
с и с.Среди предложенных Вами ответов моему решению соответствует вариант д.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
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