$(5$ pts$)2.$ A small object wit I negative charge $q=-4\mathrm{.}00{10}^{-6}C$ is released from rest at point A and the object has kinetic energy $8\mathrm{.}00{10}^{-5}J$ when it reaches point $B.$ The electric potential at point $A$ is $V_A=140V.$ If the electrical force is the only force that does work on the charge, what is the electric potential at point $B?$