Electric Potential: Solving for Time w/ E, V, & X

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mitch45
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I'm not asking anyone to solve my homework for me but I am stuck on this problem.

The problem includes finding the time is takes for an electron with a horizontal initial speed v m/s to make it through a region with an electric field X V/m pointing vertically upward.

One equation I found that could be useful is E = - [tex]\Delta[/tex]V/[tex]\Delta[/tex]s . This includes the electric field and the distance that the electron travels in the problem but does not include velocity or distance. I have been searching for some link in equations or way to substitute but I am honestly stuck. Any help would be appreciated!
 
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Take a look at the Lorentz Force.