Задача id10473

Two dielectric spheres with a radius of 1 cm and a mass of 12 g each are uniformly charged with the same charge of 0.4 μC. At the initial moment, one of the balls is at rest, and the second one approaches it from afar at a speed of 5 m/s. Find the speed of the initially stationary ball immediately before their collision, k = 9*109 m/F.

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