1. The problem statement, all variables and given/known data Each of the protons in a particle beam has a kinetic energy of 3.25 x 10^-15 J. What are the magnitude and direction of the electric field that will stop these protons in a distance of 1.25 m? 2. Relevant equations Felectric = kC (q*q/r^2) Electric Field= Felectric/q Electric Field= kC (q/r^2) Velocityfinal= velocityInitial + a*t Velocityfinal^2 = VelocityInitial^2 + 2a(d) 3. The attempt at a solution I need help with this.