An electron enters a uniform electric field with some initia

An electron enters a uniform electric field (with some initial velocity) between two parallel plates vertically separated with E = 400 N/C. Does the electron accelerate or de-accelerate? What is this value?

as we know F = qE = 1.6 x 10^-19 x 400 = 640 x 10^-19 = 6.4 x 10^-17 N = (me) * a (me = electron mass)
a = F/ (me) = 6.4 x 10^-17 / 9.1 x 10^-31 = 7.00 x 10^13 m/s^2

so electron will accelerate