# Electric Potential

1. Oct 4, 2009

### mitch45

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 = - $$\Delta$$V/$$\Delta$$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!!

2. Oct 5, 2009

### Born2bwire

Take a look at the Lorentz Force.