A particle with charge $4\mathrm{.}8*10^-19*$ 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.

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Constants

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 $1\mathrm{.}8*10^-19*$ J In what direction and through what potential difference does the particle move?