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Задать вопрос экспертам

Консультация № 200632

12.04.2021, 14:29

0.00 руб.

0 1 1

Образование

Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос: маховик, бывший неподвижным, начал вращаться равноускоренно и, сделав 20 полных оборотов, приобрёл угловую скорость, соответствующую 20 об/с. определите угловое ускорение маховика и продолжительность вращения.

Обсуждение

давно

Посетитель
226425
1567

13.04.2021, 00:32

общий

это ответ

Здравствуйте, vladislav.makeev88!
Дано:
[$966$]_o=0
[$969$]_o=0
N=20
f=20c^-1
Найти: [$949$]; t.
Решение:
1. [$966$]=2[$960$]N=[$949$]t²/2 (1)
2. [$969$]=2[$960$]f=[$949$]t (2)
Поделим выражение (1) на (2)
Получим
3. N/f=t/2
Отсюда
t=2N/f=2c
4. Из выражения (2)
[$949$]=2[$960$]f/t = 20[$960$] c^-2.
***
Удачи

5

Об авторе:
С уважением
shvetski

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