Задача id9627

Into a space where horizontal and vertical homogeneous electrostatic fields, the strengths of which are Er = 4 • 102 V/m and Ev = 3 • 102 V/m, simultaneously act, an electron flies along the direction of the resulting field, the speed of which after passing the path is l = 2.7 mm decreases by 2 times. Determine the speed of the electron at the end of the path. The mass of the electron is me = 9.1 • 10-31 kg, its charge e = 1.6 • 1019 C.

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