Tracking an Electron Through an Electric Field

[vucollegeguy]

An electron with speed of v₀=1.94 x 10⁷ m/s is traveling parallel to an electric field of magnitude E= 1.47 × 10⁴ N/C.

How far will the electron travel before it stops?
How much time will elapse before it returns to its starting point?

 

[rl.bhat]

Show your attempts.
Why the moving electrons stop and move in the reverse direction?