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Консультация № 200595
08.04.2021, 10:54
0.00 руб.
1
1
1
Здравствуйте! Прошу помощи в следующем вопросе:
Диск вращается с угловым ускорением, зависимость от времени которого задается графиком (на фото). Найти максимальную угловую скорость диска в интервале времени 0 < t < 4 с, если Emax 2 с^–2.
а) 3 с–1; б) 5 с–1; в) 7 с–1; г) 9 с–1; д) 11 с–1;
Диск вращается с угловым ускорением, зависимость от времени которого задается графиком (на фото). Найти максимальную угловую скорость диска в интервале времени 0 < t < 4 с, если Emax 2 с^–2.
а) 3 с–1; б) 5 с–1; в) 7 с–1; г) 9 с–1; д) 11 с–1;
Прикрепленные файлы:
Обсуждение
09.04.2021, 09:27
общий
это ответ
Здравствуйте, Дмитрий!
Предлагаю Вам следующее решение задачи.
Дано: закон изменения углового ускорения диска (рисунок),
с-2 -- максимальное угловое ускорение диска.
Определить:
-- максимальную угловую скорость диска в интервале времени 
Из предложенного Вами рисунка видно, что угловое ускорение диска в промежутке времени
принимает положительные значения. Поэтому угловая скорость диска монотонно возрастает и имеет максимальное значение при 
с. Если в момент времени 
с диск покоился, то максимальное значение его угловой скорости в рассматриваемый промежуток времени численно равно площади фигуры под графиком на рисунке, то есть при с 
(с-1).
Ответ:
с-1.
Предлагаю Вам следующее решение задачи.
Дано: закон изменения углового ускорения диска (рисунок),
с-2 -- максимальное угловое ускорение диска.Определить:
-- максимальную угловую скорость диска в интервале времени Решение
Из предложенного Вами рисунка видно, что угловое ускорение диска в промежутке времени
принимает положительные значения. Поэтому угловая скорость диска монотонно возрастает и имеет максимальное значение при с. Если в момент времени с диск покоился, то максимальное значение его угловой скорости в рассматриваемый промежуток времени численно равно площади фигуры под графиком на рисунке, то есть при с (с-1).Ответ:
с-1.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
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