A small, negatively charged particle has a charge of 1.33e-6 C and a mass of 8 mg. It moves from point A, where the electric potential is 151 V, to point B, where the electric potential is 50 V greater than the potential at point A. The electric force is the only force acting on the particle. The particle has a speed of 9.6 m/s at point A.
What is its speed at point B?