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Консультация № 200594
08.04.2021, 10:52
0.00 руб.
1
1
1
Здравствуйте! Прошу помощи в следующем вопросе:
Частица из состояния покоя начала двигаться по дуге окружности радиуса м с угловой скоростью, модуль которой зависит от времени по закону (на фото) . Через сколько секунд угол между полным ускорением частицы и ее скоростью будет равен 45°, если г= 1 с А = 5*10^18 с–1.
а) 0,04 с; б) 0,03 с; в) 0,02 с; г) 0,01 с; д) 0,001 с;
Частица из состояния покоя начала двигаться по дуге окружности радиуса м с угловой скоростью, модуль которой зависит от времени по закону (на фото) . Через сколько секунд угол между полным ускорением частицы и ее скоростью будет равен 45°, если г= 1 с А = 5*10^18 с–1.
а) 0,04 с; б) 0,03 с; в) 0,02 с; г) 0,01 с; д) 0,001 с;
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Обсуждение
09.04.2021, 08:12
общий
это ответ
Здравствуйте, Дмитрий!
Предлагаю Вам следующее решение задачи.
Дано:
-- закон изменения модуля угловой скорости частицы; 
м -- радиус окружности, по которой движется частица.
Определить:
-- момент времени, в который полное ускорение частицы и её скорость составляют угол 
Скорость частицы изменяется по закону
(м/с), тангенциальное ускорение -- по закону 
(м/с2), нормальное ускорение -- по закону 
(м/с2). В момент времени, в который полное ускорение частицы и её скорость составляют угол 
векторы тангенциального и нормального ускорений равны по модулю, то есть 
откуда получим 
(с).
Ответ:
с.
Предлагаю Вам следующее решение задачи.
Дано:
-- закон изменения модуля угловой скорости частицы; м -- радиус окружности, по которой движется частица.Определить:
-- момент времени, в который полное ускорение частицы и её скорость составляют угол Решение
Скорость частицы изменяется по закону
(м/с), тангенциальное ускорение -- по закону (м/с2), нормальное ускорение -- по закону (м/с2). В момент времени, в который полное ускорение частицы и её скорость составляют угол векторы тангенциального и нормального ускорений равны по модулю, то есть откуда получим (с).Ответ:
с.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
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