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Консультация № 196122
14.08.2019, 20:05
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1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Какой должна быть продолжительность суток T на Земле, чтобы тела на экваторе были невесомы? Радиус Земли 6400 км.
Какой должна быть продолжительность суток T на Земле, чтобы тела на экваторе были невесомы? Радиус Земли 6400 км.
Обсуждение
17.08.2019, 08:58
общий
это ответ
Здравствуйте, dar777!
Пусть тело массой
находится на экваторе. На это тело со стороны Земли массой 
кг [1, с. 373] действуют направленная к её центру сила тяготения 
[1, с. 53], где 
м3/(кг*с2) -- гравитационная постоянная, и сила 
реакции земной поверхности, направленная в противоположную сторону. Равнодействующая этих сил сообщает телу нормальное ускорение 
где 
-- период вращения Земли вокруг своей оси (продолжительность суток). Из второго закона Ньютона получим
-- сила реакции земной поверхности. Вес тела равен этой силе и действует со стороны тела на поверхность Земли. Если вес тела равен нулю, то
и
(с).
Литература
1. Трофимова Т. И. Сборник задач по курсу физики для втузов. -- М.: ООО "Издательский дом "Оникс 21 век"", 2003. -- 384 c.
Пусть тело массой
находится на экваторе. На это тело со стороны Земли массой кг [1, с. 373] действуют направленная к её центру сила тяготения [1, с. 53], где м3/(кг*с2) -- гравитационная постоянная, и сила реакции земной поверхности, направленная в противоположную сторону. Равнодействующая этих сил сообщает телу нормальное ускорение где -- период вращения Земли вокруг своей оси (продолжительность суток). Из второго закона Ньютона получим-- сила реакции земной поверхности. Вес тела равен этой силе и действует со стороны тела на поверхность Земли. Если вес тела равен нулю, то
и (с).Литература
1. Трофимова Т. И. Сборник задач по курсу физики для втузов. -- М.: ООО "Издательский дом "Оникс 21 век"", 2003. -- 384 c.
5
Это самое лучшее решение!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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