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Консультация № 194832
28.02.2019, 18:13
0.00 руб.
01.03.2019, 09:32
1
3
1
Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
Помогите решить задачу.Спасибо!
Частица движется так, что её скорость зависит от времени по закону
где
-- постоянные величины, 
-- единичные орты в декартовой системе координат. Через сколько секунд ускорение частицы будет параллельно оси 
если 
с, 
м/с, 
м/с.
а)
с; б) 
с; в) 
с; г) 
с; д) 
с.
Помогите решить задачу.Спасибо!
Частица движется так, что её скорость зависит от времени по закону
где
-- постоянные величины, -- единичные орты в декартовой системе координат. Через сколько секунд ускорение частицы будет параллельно оси если с, м/с, м/с.а)
с; б) с; в) с; г) с; д) с.
Прикрепленные файлы:
Обсуждение
01.03.2019, 08:40
общий
это ответ
Здравствуйте, nata!
Если
то
Если вектор
ускорения параллелен оси то его компонента вдоль этой оси не равна нулю, а компонента вдоль оси 
равна нулю, то есть
Решая уравнение (1), получим
с, 
с.
При этом неравенство (2) выполняется.
Из указанных в условии задачи значений
подходящим является вариант д).
Если
то
Если вектор
ускорения параллелен оси то его компонента вдоль этой оси не равна нулю, а компонента вдоль оси равна нулю, то естьРешая уравнение (1), получим
с, с.При этом неравенство (2) выполняется.
Из указанных в условии задачи значений
подходящим является вариант д).
5
Огромное спасибо.
Об авторе:
Facta loquuntur.
Facta loquuntur.
01.03.2019, 08:40
общий
Предлагаю дополнить сообщение, открывающее консультацию, текстом задания, набранным мной ниже.
Частица движется так, что её скорость зависит от времени по закону
где -- постоянные величины, -- единичные орты в декартовой системе координат. Через сколько секунд ускорение частицы будет параллельно оси если с, м/с, м/с.
а) с; б) с; в) с; г) с; д) с.
Частица движется так, что её скорость зависит от времени по закону
где
-- постоянные величины, -- единичные орты в декартовой системе координат. Через сколько секунд ускорение частицы будет параллельно оси если с, м/с, м/с.а)
с; б) с; в) с; г) с; д) с.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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