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Консультация № 196849
28.10.2019, 10:25
0.00 руб.
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Прямолинейное движение материальной точки задано уравнением S(t)=8+2t-24t^2-0.3t^5 , (м). В какой момент времени скорость точки будет равна 2 м/с? Помогите с решением пожалуйста.
Прямолинейное движение материальной точки задано уравнением S(t)=8+2t-24t^2-0.3t^5 , (м). В какой момент времени скорость точки будет равна 2 м/с? Помогите с решением пожалуйста.
Обсуждение
31.10.2019, 11:48
общий
Адресаты:
а можно решение подробнее?? не очень понимаю как получилось что t=0
01.08.2022, 07:44
общий
это ответ
Здравствуйте, Iriska!
Если
то 
Если 
то
Значит, скорость материальной точки равна
м/с в моменты времени 
с и 
с. Второй корень не подходит, если считать, что начальный момент движения материальной точки -- это 
Тогда остаётся единственный ответ: 
с.
Если
то Если тоЗначит, скорость материальной точки равна
м/с в моменты времени с и с. Второй корень не подходит, если считать, что начальный момент движения материальной точки -- это Тогда остаётся единственный ответ: с.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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