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4. Колесо радиусом R = 1 м вращается по закону ф= At + Bt2 , где А = 0,05 рад/с, В = 0,1 рад/с2. Найдите тангенциальное, нормальное и полное ускорения точек на ободе колеса через две секунды после на¬чала движения.
