A small particle has charge −5.00μC and mass 2.00×10−4 kg . It moves from point A , where the electric potential is VA=+200 V , to point B , where the electric potential is VB=+800 V . The electric force is the only force acting on the particle. The particle has speed 5.00 m/s at point A . What is its speed at point B ? Is it moving faster or slower at B than at A ? Explain.