Задача 10388.

A ball attached to a weightless thread rotates in a horizontal plane around a vertical axis. What work will be done when the thread is shortened three times, if the work A1 = 0.3 J was done when the thread was shortened twice?

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.