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Вопрос по физике:
Точка движется по окружности радиусом 10м. Закон движения точки выражается уравнением S=4-2t^2+t^4. В какой момент времени ускорение точки будет равно 44 м/с^2. Найти нормальное ускорение точки в этот момент.
Буду очень благодарен, если решите с объяснением)-
Автор:
ty59
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Физический смысл производной:
Скорость - это первая производная перемещения по времени.
Ускорение- это вторая производная перемещения по времени.
то есть: a(t)=v'(t)=s''(t)
По условию, а=44 м/с², значит
Тогда скорость точки в момент времени 2с будет:
v(2)=-4*2+4*2³=-8+4*8=24 м/c
Нормальное ускорение:
Еще 4 ненужных тебе вопроса, но это важно для поиска
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