1. The problem statement, all variables and given/known data Equipotential surface A has a potential of 5650V, while equipotential surface B has a potential of 7850V. A particle has a mass of 5.00*10^-2kg and a charge of +4.00*10^-5. The particle has a speed of 2.00 m/s on the surface A. An outside force is applied to the particle and it moves to surface B, arriving there with a speed of 3.00 m/s. How much work is done by the outside force in moving the particle from A to B? 2. Relevant equations 3. The attempt at a solution Can someone please help me with this problem? I really need help with how to start this problem and what equations to use! Please help.