The Electrons in a Particle Beam Enter an Electric Field

Multiple Choice

The electrons in a particle beam enter an electric field of 2000 N/C and are stopped in a distance of 1 m.What was the kinetic energy of one of these electrons prior to entering the electric field?

A) 1.2 * 10^-16 J
B) 3.7 * 10^-16 J
C) 1.6 * 10^-16 J
D) 2.5 * 10^-16 J
E) 3.2 * 10^-16 J