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A particle with charge 3.20×10?19 C is placed on the x axis in a region where...

A particle with charge 3.20×10?19 C is placed on the x axis in a region where the electric potential due to other charges increases in the +x direction but does not change in the y or z direction.

The particle, initially at rest, is acted upon only by the electric force and moves from point a to point b along the x axis, increasing its kinetic energy by 1.12×10?18 J . In what direction and through what potential difference Vb?Va does the particle move?

If the particle moves from point b to point c in the y direction, what is the change in its potential energy, Uc?Ub?

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