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Консультация № 194505
24.01.2019, 13:01
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Пружина с коэффициентом жесткости 196 Н/м в ненапряженном состоянии имеет длину 20см. С какой скоростью вылетит из трубки шарик массой 300г, если пружина была сжата до 10см. Трением пренебречь
Пружина с коэффициентом жесткости 196 Н/м в ненапряженном состоянии имеет длину 20см. С какой скоростью вылетит из трубки шарик массой 300г, если пружина была сжата до 10см. Трением пренебречь
Обсуждение
28.01.2019, 20:40
общий
это ответ
Здравствуйте, ioigsh!
Применим теорему об изменении кинетической энергии материальной точки в интегральной форме:
Работу на перемещении
(м) (если пружина расположена горизонтально) совершает только сила упругости 
а скорость шарика при сжатом положении пружины 
Тогда
где
Н/м -- жёсткость пружины. Следовательно,
(м/с).
Применим теорему об изменении кинетической энергии материальной точки в интегральной форме:
Работу на перемещении
(м) (если пружина расположена горизонтально) совершает только сила упругости а скорость шарика при сжатом положении пружины Тогдагде
Н/м -- жёсткость пружины. Следовательно, (м/с).
Об авторе:
Facta loquuntur.
Facta loquuntur.
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