The work done by an external force to move a $-7\mathrm{.}00\backslash$mu C

charge from point A

to point B

is $1\mathrm{.}90\backslash$times $103$ J

$.$ If the charge was started from rest and had $4\mathrm{.}72\backslash$times $104$ J

of kinetic energy when it reached point B

$,$ what must be the potential difference between A

and B

$?$