Electrostatics

[blue_soda025]

An electron is travelling horizontally at a speed of 8.70 x 10^6 m/s enters an electric field of 1.32 x 10^3 N/C between two horizontal parallel plates as described in the diagram.
Calculate the vertical displacement of the electron as it travels between the plates.

How do I go about solving this? Any help would be appreciated since I have a test tomorrow.

[kevinalm]

t=Horizontal length/velocity
f=electron charge*electic field
a=f/electron mass

Then use the formula for x(t) of constant acceleration

This ignores gravity which almost certainly isn't significant, and relativistic effects which are nearly as insignificant as the velocity<<c.