Задача id9144

A positive charge of 10-10k is uniformly distributed on the surface of a ball with a radius of 2 cm. An electron located very far from the ball has an initial speed v0 = 0. At what speed will it approach the ball? (Electron mass m = 9.11 • 10-31 kg, and its charge e = - 1.6 • 10-19 / s.)

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