College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 79

At the equator, near the surface of Earth, the magnetic field is approximately 50.0 T northward, and the electric field is about 100 N/C downward in fair weather. Find the gravitational, electric, and magnetic forces on an electron with an instantaneous velocity of 6.00 × 10 6 m/s directed to the east in this environment.