Задача id12690

On a smooth horizontal surface at a distance L = 3 m from a vertical wall, there is a ball with mass M = 800 g, another ball with mass m = 200 g slides with some speed in the direction from the wall to the first ball. A central elastic impact occurs between the balls. After the impact, the second ball reaches the wall and, elastically reflected from it, catches up and hits the first ball a second time. Determine at what distance from the wall the second collision will occur.

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