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Консультация № 195647
18.05.2019, 03:16
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1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Шар массой 5 кг и радиусом 10 см вращается вокруг оси, проходящей через его центр, по закону φ = 2 + 40t – 5t2. Найти среднее значение момента импульса шара за промежуток времени от t = 0 до остановки. Какая работа была совершена за это время?
Шар массой 5 кг и радиусом 10 см вращается вокруг оси, проходящей через его центр, по закону φ = 2 + 40t – 5t2. Найти среднее значение момента импульса шара за промежуток времени от t = 0 до остановки. Какая работа была совершена за это время?
Обсуждение
20.05.2019, 11:10
общий
это ответ
Здравствуйте, dar777!
рад -- зависимость угла поворота шара от времени вращения;
рад/с -- зависимость угловой скорости шара от времени вращения [1, с. 39];
рад/с2 -- угловое ускорение шара [1, с. 40];
кг*м2 -- момент инерции шара относительно оси, проходящей через его центр [1, с. 46];
в момент остановки
с -- время от начала движения шара до его остановки;
-- среднее значение функции 
на интервале 
[2, с. 334 -- 336];
-- момент импульса [1, с. 44];
(Дж*с) -- среднее значение момента импульса за промежуток времени от 
с до остановки;
(Дж) -- кинетическая энергия шара в момент времени с [1, с. 46];
Дж -- кинетическая энергия шара в момент остановки;
(Дж) -- работа внешних сил за промежуток времени от с до остановки.
Литература
1. Детлаф А. А., Яворский Б. М. Курс физики. -- М.: Высш. шк., 1989. -- 608 с.
2. Фихтенгольц Г. М. Основы математического анализа. Часть 1. -- СПб.: Издательство "Лань", 2004. -- 448 с.
рад -- зависимость угла поворота шара от времени вращения; рад/с -- зависимость угловой скорости шара от времени вращения [1, с. 39]; рад/с2 -- угловое ускорение шара [1, с. 40]; кг*м2 -- момент инерции шара относительно оси, проходящей через его центр [1, с. 46];в момент остановки
с -- время от начала движения шара до его остановки; -- среднее значение функции на интервале [2, с. 334 -- 336]; -- момент импульса [1, с. 44]; (Дж*с) -- среднее значение момента импульса за промежуток времени от с до остановки; (Дж) -- кинетическая энергия шара в момент времени с [1, с. 46]; Дж -- кинетическая энергия шара в момент остановки; (Дж) -- работа внешних сил за промежуток времени от с до остановки.Литература
1. Детлаф А. А., Яворский Б. М. Курс физики. -- М.: Высш. шк., 1989. -- 608 с.
2. Фихтенгольц Г. М. Основы математического анализа. Часть 1. -- СПб.: Издательство "Лань", 2004. -- 448 с.
5
Это самое лучшее решение!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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