Задача 10363.

Two balls are suspended on thin parallel threads and touch each other. The smaller ball is retracted 90 ° from its original position and released. After hitting the balls rose to the same height. Determine the mass of the smaller ball, if the mass is larger than 0.6 kg, and the impact is absolutely elastic.

A detailed solution with a brief record of the conditions, formulas and laws used in the solution, the derivation of the calculation formula and the answer.
If you have questions about the solution, write. I try to help.