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Консультация № 202732
06.05.2022, 12:22
0.00 руб.
08.05.2022, 22:50
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1
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Здравствуйте! У меня возникли сложности с такой задачей: Вагон закатывается на горку по склону , составляющему угол 30 градусов с горизонтом. [color=gray]вагон закатывается на горку по склону составляющему 30 градусов с горизонтом[/color]. Величина силы трения равняется 10% от величины силы, с которой вагон притягивается к Земле. К потолку вагона на нити подвешено небольшое тело массой 20г. Определить силу натяжения нити, если тело неподвижно относительно вагона. При нахождении силы натяжения нити использовать систему отсчета, связанную с вагоном. Сделать рисунок.
Обсуждение
07.05.2022, 08:42
общий
Адресаты:
Здравствуйте, lusya.v.57 ! В Условии Вашей задачи недостаточно исходных данных.
Я начертил схематичный чертёжик, где вагон поднимают на горку вправо-вверх. Значит, сила трения направлена в противоположную сторону - влево-вниз. Совершенно очевидно, что чем с бОльшим ускорением вагон стремится вправо, тем сильнее нить с телом отклонится влево и с бОльшим натяжением.
Но ни ускорение вагона, ни сила его тяги на горку НЕ указаны. А если предположить, будто вагон едет равномерно (без ускорения), тогда нить с телом направлена вертикально вниз и имеет обычное натяжение m*g .
Может, Вы скопировали текст своего Вопроса с рисунка НЕ полностью? Приложите рисунок с исходным Условием задачи.
Я начертил схематичный чертёжик, где вагон поднимают на горку вправо-вверх. Значит, сила трения направлена в противоположную сторону - влево-вниз. Совершенно очевидно, что чем с бОльшим ускорением вагон стремится вправо, тем сильнее нить с телом отклонится влево и с бОльшим натяжением.
Но ни ускорение вагона, ни сила его тяги на горку НЕ указаны. А если предположить, будто вагон едет равномерно (без ускорения), тогда нить с телом направлена вертикально вниз и имеет обычное натяжение m*g .
Может, Вы скопировали текст своего Вопроса с рисунка НЕ полностью? Приложите рисунок с исходным Условием задачи.
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