Aparticle 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.

part a:
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 8.00×10−19 j . in what direction and through what potential difference vb−va does the particle move?

the particle moves to the left through a potential difference of vb−va= 2.50 v .
the particle moves to the left through a potential difference of vb−va= -2.50 v
the particle moves to the right through a potential difference of vb−va= 2.50 v .
the particle moves to the right through a potential difference of vb−va= -2.50 v .
the particle moves to the left through a potential difference of vb−va= 25.0 v .
the particle moves to the right through a potential difference of vb−va= -25.0 v .

part b:
if the particle moves from point b to point c in the y direction, what is the change in its potential energy, uc−ub.

+ 8.00×10−19 j
− 8.00×10−19 j
0