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Консультация № 190644
04.03.2017, 00:26
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Здравствуйте! Прошу помощи в следующем вопросе:
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Обсуждение
05.03.2017, 07:50
общий
это ответ
Здравствуйте, moonfox!
Пусть на уровне стола у монеты нулевая потенциальная энергия. Тогда на вершине горки массой
монета имеет потенциальную энергию, равную 
При этом импульс системы, состоящей из монеты и первой горки, равен нулю. В момент, когда монета съезжает с первой горки, она имеет скорость 
импульс 
и кинетическую энергию 
В этот момент первая горка приобретает скорость величиной 
импульс величиной 
и кинетическую энергию 
Согласно законам сохранения импульса и механической энергии,
После съезда с первой горки монета въедет на вторую горку, поднявшись на высоту
и обладая потенциальной энергией 
Монета и вторая горка будут иметь одинаковую скорость 
импульс этой системы равен 
кинетическая энергия равна 
Согласно законам сохранения импульса и механической энергии,
Из уравнения
получим 
и подставим в уравнение 
Тогда 
После подстановки в уравнение 
получим 
После подстановки в уравнение 
получим
То есть монета сможет подняться на высоту
Пусть на уровне стола у монеты нулевая потенциальная энергия. Тогда на вершине горки массой
монета имеет потенциальную энергию, равную При этом импульс системы, состоящей из монеты и первой горки, равен нулю. В момент, когда монета съезжает с первой горки, она имеет скорость импульс и кинетическую энергию В этот момент первая горка приобретает скорость величиной импульс величиной и кинетическую энергию Согласно законам сохранения импульса и механической энергии,После съезда с первой горки монета въедет на вторую горку, поднявшись на высоту
и обладая потенциальной энергией Монета и вторая горка будут иметь одинаковую скорость импульс этой системы равен кинетическая энергия равна Согласно законам сохранения импульса и механической энергии,Из уравнения
получим и подставим в уравнение Тогда После подстановки в уравнение получим После подстановки в уравнение получимТо есть монета сможет подняться на высоту
Об авторе:
Facta loquuntur.
Facta loquuntur.
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