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Консультация № 191271
09.08.2017, 10:16
0.00 руб.
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
На железнодорожной тележке массой М жестко закреплен вертикальный щит, повернутый на угол альфа от перпендикулярного рельсам положения (см рис.) в щит бросают мешок с песком массой m, горизонтальная составляющая начальной скорости которого равна V0 и направлена вдоль рельсов. найдите скорость V тележки:
а) после того, как мешок, ударившись о щит, сполз по нему вниз и упал на тележку
б) мешок, ударившись о щит, сполз по нему вниз и упал с тележки.
Трением мешка о щит и сопротивлением движению тележки можно пренебречь. До удара тележка была неподвижна.
P.S. если можно задачу решить без применения интегралов
На железнодорожной тележке массой М жестко закреплен вертикальный щит, повернутый на угол альфа от перпендикулярного рельсам положения (см рис.) в щит бросают мешок с песком массой m, горизонтальная составляющая начальной скорости которого равна V0 и направлена вдоль рельсов. найдите скорость V тележки:
а) после того, как мешок, ударившись о щит, сполз по нему вниз и упал на тележку
б) мешок, ударившись о щит, сполз по нему вниз и упал с тележки.
Трением мешка о щит и сопротивлением движению тележки можно пренебречь. До удара тележка была неподвижна.
P.S. если можно задачу решить без применения интегралов
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