College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 45

Each of the electrons in a particle beam has a kinetic energy of 1.60 × 10 17 J. (a) What is the magnitude of the uniform electric field (pointing in the direction of the electrons' movement) that will stop these electrons in a distance of 10.0 cm (b) How long will it take to stop the electrons (c) After the electrons stop, what will they do Explain.