Solution to task 445 from Chertov´s for extramural stud

Solution to task 445 from Chertov´s for extramural stud

445. Homogeneous magnetic (B = 2.5 mT) and electric (E = 10 kV / m) fields are crossed at right angles. An electron whose velocity v is equal to 4.106 m / s, and these fields flies in so that the forces acting on it from the side of the magnetic and electric fields are co-directed. Determine the acceleration a * of the electron.