A uniform electric field has a magnitude of 3.0 103 N/C. In a vacuum, a proton begins with a speed of 2.4 104 m/s and moves in the direction of this field. Find the speed of the proton after it has moved a distance of 1.0 mm. I am confused with the fact that there is a velocity int his problem, I have not done electrostatics since last year and I do not recall any formulas with velocity or speed. I have used the equation [tex]E = F/q[/tex] to find Force...then I just don't know what to do after that, any suggestions or hints are appreciated, thank you!