Задача id8886

Two lead balls are moving progressively towards each other along a straight line connecting their centers. When the balls collide, an inelastic impact occurs, after which the balls move together. Find the amount of heat released upon impact. The first ball had a mass of 1 kg and a speed of 20 m/sec, and the second had a mass of 2 kg and a speed of 4 m/sec.

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