Two charges q$1=3\mathrm{.}20$ nC and q$2=+8\mathrm{.}74$ nC are at a distance of $1\mathrm{.}51$m from each other. q$1$ is fixed at its location while q$2$ is released from rest.

$($a$)$ What is the kinetic energy of the charge q$2$ when it is $0\mathrm{.}340$m from q$1?$

$-0\mathrm{.}0000000004431$

Incorrect: Your answer is incorrect.

What is the electric potential at the initial and final locations of the moving charge due to the fixed charge? What is the change in electric potential energy of the moving charge? J

$($b$)$ The charge q$2$ has a mass m$2=7\mathrm{.}85$g$.$ What is its speed when it is $0\mathrm{.}340$m from q$1?$

m$/$s