Мяч массой m бросают вертикально вверх со скоростью u с поверхности земли . внутренняя энергия мяча зависит от.. ( от чего , поясните)? бетонную плиту обьемом 0.5м(в кубе) равномерно подняли на некоторую высоту.чему равна высота на которую подняли плиту , если совершенная при этом работа равна 23кдж?

внутрення энергия мяча зависит от начальной скорости и высоты на которую мяч долетает, так как внутрення энергия равна сумме потенциальной и кинетической энергии а по формуле кинетическая=массу умножить на квадрат скорости, а потенциальная=высоту умножить на джи и на массу.           работа=сила умноженная на перемещение. сила в этом случае равна 10 н (джи)

следовательно, перемещение=работа/сила=23/0.5=46метров 

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