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## Homework Statement

Across what potential difference does an electron have to be accelerated in order to reach speed v=1.80×106 m/s?

## Homework Equations

I checked to see if relitivity was important and it was not

E=.5 m v^2=eV

## The Attempt at a Solution

I dunno if I am mistaken in what I am trying to find but I thought the potential difference in this case was .5mv^2 But when I plug in 9.109x10^-31 kg in for the mass and 1.8x10^6 m.s for the velocity I don't get the right answer. I do not know what I am doing wrong.