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hirschy
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Homework Statement
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?
Homework 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)
The Attempt at a Solution
I need help with this.