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Консультация № 194799
25.02.2019, 22:50
0.00 руб.
26.02.2019, 09:18
1
3
1
Здравствуйте! У меня возникли сложности с таким вопросом:
Помогите решить задачу, пожалуйста:
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 перпендикулярно оси 
если 
c, 
м/с, 
м/с?
а)
с; б) 
с; в) 
с; г) 
с; д) 
с.
Помогите решить задачу, пожалуйста:
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 перпендикулярно оси если c, м/с, м/с?а)
с; б) с; в) с; г) с; д) с.
Прикрепленные файлы:
Обсуждение
26.02.2019, 08:35
общий
это ответ
Здравствуйте, qazxswedc!
Для ускорения
частицы имеем
Вектор ускорения частицы будет перпендикулярен оси если его компонента вдоль оси 
равна нулю, а компонента вдоль оси 
не равна нулю, то есть выполняются соотношения
Решая уравнение (1), получим, что
(с). При этом неравенство (2) выполняется.
Итак,
с.
Для ускорения
частицы имеемВектор ускорения частицы будет перпендикулярен оси
если его компонента вдоль оси равна нулю, а компонента вдоль оси не равна нулю, то есть выполняются соотношенияРешая уравнение (1), получим, что
(с). При этом неравенство (2) выполняется.Итак,
с.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
26.02.2019, 08:36
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 перпендикулярно оси если c, 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 перпендикулярно оси если c, м/с, м/с?а)
с; б) с; в) с; г) с; д) с.
Об авторе:
Facta loquuntur.
Facta loquuntur.
26.02.2019, 09:20
общий
Адресаты:
Гордиенко Андрей Владимирович Предлагаю дополнить сообщение, открывающее консультацию, текстом задания
Сделано.
Об авторе:
We have but faith: we cannot know;
For knowledge is of things we see;
And yet we trust it comes from thee,
A beam in darkness: let it grow.
-----
https://www.linkedin.com/in/andreynkuznetsov
https://www.researchgate.net/profile/Andrey_Kuznetsov11
http://www.researcherid.com/rid/K-8824-2014
We have but faith: we cannot know;
For knowledge is of things we see;
And yet we trust it comes from thee,
A beam in darkness: let it grow.
-----
https://www.linkedin.com/in/andreynkuznetsov
https://www.researchgate.net/profile/Andrey_Kuznetsov11
http://www.researcherid.com/rid/K-8824-2014
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