How Much Work is Done on a Charged Particle Between Two Equipotential Surfaces?

[silver_gry]

Homework Statement

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?

Homework Equations

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.

 

[LowlyPion]

What is the equation for relating Work and equipotential surfaces?

What changes in kinetic energy have occurred?