A ball attached to a weightless thread length l1 = 50 cm

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A ball attached to a weightless thread length l1 = 50 cm, is rotated in a horizontal plane about a vertical axis at a speed n1 = 2 v / v. What will be equal to the angular momentum of the ball, if the shortening of the thread is 10 cm, its kinetic energy becomes equal to T2 = 0.48 J?

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Задача 10216. Подробное решение с краткой записью условия, формул и законов, используемых в решении, выводом расчетной формулы и ответом.
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