Potential Energy and the Electric Potential Difference

[WGDawg3]

I'm back again this week with a problem:

A particle has a charge of +1.5 Micro Coulombs and moves from point A to point B, a distance of .20 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at A and B is EPE_A - EPE_B = +9.0x10^-4 J. (a) Find the magnitude and direction of the electric force that acts on the particle. (b) Find the magnitude and direction of the electric field that the particle experiences.

 

[Defennder]

What have you done regarding this? How does the force exerted by the E-field relate to its electric potential energy?