A small particle has charge -2.30\mu C and mass 3.00×10^-4kg . It moves from point A, where the electric potential is V_A = 120V , to point B, where the electric potential V_B = 520V is greater than the potential at point A. The electric force is the only force acting on the particle. The particle has a speed of 4.60m/s at point A.
What is its speed at point B?
is it moving faster or slower at b than at a?