Задача 10263.

A ball weighing m=20 g, attached to a weightless thread L=50 cm long, rotates in a horizontal plane around a vertical axis with a frequency n1=2 rev/s. Determine the angular velocity and kinetic energy of the ball if the length of the thread is shortened by 3 times, thereby bringing the ball closer to the axis of rotation.

A detailed solution with a brief note of the conditions, formulas and laws used in the solution, the derivation of the calculation formula and the answer.
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