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Консультация № 194203
16.12.2018, 15:58
0.00 руб.
1
5
1
Здравствуйте! У меня возникли сложности с таким вопросом:
Зенитный снаряд, пущенный вертикально вверх, разорвался на 3 осколка массами 10 кг, 20кг, 30кг. Первые два осколка разлетелись под углом 120 градусов со скоростью 100 и 300 м/сек. С какой скоростью движется третий осколок? Я прикрепил файл с рисунком
Зенитный снаряд, пущенный вертикально вверх, разорвался на 3 осколка массами 10 кг, 20кг, 30кг. Первые два осколка разлетелись под углом 120 градусов со скоростью 100 и 300 м/сек. С какой скоростью движется третий осколок? Я прикрепил файл с рисунком
Прикрепленные файлы:
Обсуждение
16.12.2018, 17:42
общий
Адресаты:
Вы пробовали применить закон сохранения импульса?
Об авторе:
Facta loquuntur.
Facta loquuntur.
16.12.2018, 18:01
общий
Адресаты:
Den конечно, задача на этом и построена, но все равно не получается
Что не получается?
Об авторе:
Facta loquuntur.
Facta loquuntur.
18.12.2018, 15:21
общий
Адресаты:
Мне кажется, здесь должна бы быть еще указана скорость снаряда перед разрывом. Или, что снаряд разорвался в верхней точке траектории. Без этого ЗСИ не применить.
Об авторе:
С уважением
shvetski
С уважением
shvetski
20.12.2018, 14:29
общий
это ответ
Здравствуйте, Den!
Предположим, что снаряд разорвался в верхней точке траектории, когда вектор его импульса нулевой; третий осколок после разрыва снаряда движется вертикально вниз, как показано на Вашем рисунке. Пусть вектор
составляет с осью 
угол 
тогда вектор 
составляет с этой осью угол 
В соответствии с законом сохранения импульса в проекциях на ось и ось 
направленную вправо, получим
Из уравнения
следует, что
Теперь из уравнения
получим
(м/с).
Предположим, что снаряд разорвался в верхней точке траектории, когда вектор его импульса нулевой; третий осколок после разрыва снаряда движется вертикально вниз, как показано на Вашем рисунке. Пусть вектор
составляет с осью угол тогда вектор составляет с этой осью угол В соответствии с законом сохранения импульса в проекциях на ось и ось направленную вправо, получимИз уравнения
следует, чтоТеперь из уравнения
получим (м/с).
Об авторе:
Facta loquuntur.
Facta loquuntur.
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