Задача 10389.

A ball attached to a weightless thread rotates in a horizontal plane around a vertical axis. How many times must the thread be shortened in order to do the work A2 = 1.6 J, if the work A1 = 0.6 J is done when the thread is shortened by 2 times?

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.
If you have any questions about the solution, write. I try to help.