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Консультация № 195188
09.04.2019, 11:25
0.00 руб.
09.04.2019, 18:36
1
1
1
Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
Шар массой m[sub]1[/sub] = 2 кг налетает на покоящийся шар массой m[sub]2[/sub] = 8 кг. Импульс p[sub]1[/sub] движущегося шара равен 10 кг[$183$]м/с. удар шаров прямой, упругий. Определить непосредственно после удара:
1) импульсы p[sub]1[/sub]' первого шара и p[sub]2[/sub]' второго шара;
2) изменение [$916$]p[sub]1[/sub] импульса первого шара;
3) кинетические энергии T[sub]1[/sub]' первого шара и T[sub]2[/sub]' второго шара;
4) изменение [$916$]T[sub]1[/sub] кинетической энергии первого шара;
5) долю [$969$] кинетической энергии, переданной первым шаром второму.
Шар массой m[sub]1[/sub] = 2 кг налетает на покоящийся шар массой m[sub]2[/sub] = 8 кг. Импульс p[sub]1[/sub] движущегося шара равен 10 кг[$183$]м/с. удар шаров прямой, упругий. Определить непосредственно после удара:
1) импульсы p[sub]1[/sub]' первого шара и p[sub]2[/sub]' второго шара;
2) изменение [$916$]p[sub]1[/sub] импульса первого шара;
3) кинетические энергии T[sub]1[/sub]' первого шара и T[sub]2[/sub]' второго шара;
4) изменение [$916$]T[sub]1[/sub] кинетической энергии первого шара;
5) долю [$969$] кинетической энергии, переданной первым шаром второму.
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Обсуждение
14.04.2019, 08:06
общий
это ответ
Здравствуйте, sasha181999_9!
Скорость первого шара до удара составляет
(м/с).
Обозначим скорости первого и второго шаров после удара через
и 
соответственно. В соответствии с законами сохранения импульса и кинетической энергии получим систему уравнений
(разделим нижнее уравнение на верхнее)
После подстановки в полученные формулы числовых значений величин будем иметь
(м/с),~
(м/с).
Тогда
1)
(кг*м/с), 
(кг*м/с);
2)
(кг*м/с);
3)
(Дж), 
(Дж);
4)
(Дж);
5)
(здесь 
(Дж)).
Скорость первого шара до удара составляет
(м/с).Обозначим скорости первого и второго шаров после удара через
и соответственно. В соответствии с законами сохранения импульса и кинетической энергии получим систему уравнений (разделим нижнее уравнение на верхнее)После подстановки в полученные формулы числовых значений величин будем иметь
(м/с),~ (м/с).Тогда
1)
(кг*м/с), (кг*м/с);2)
(кг*м/с);3)
(Дж), (Дж);4)
(Дж);5)
(здесь (Дж)).
Об авторе:
Facta loquuntur.
Facta loquuntur.
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