Work Needed to Increase Electron Speed

[DeadxBunny]

Homework Statement

How much work must be done to increase the speed of an electron from rest to 0.52c?

Homework Equations

I don't know :)

The Attempt at a Solution

I tried E=Ymc^2 where Y = 1/[1-(v/c)^2]^1/2 and got 3.19821x10^-22 J which translates to 1.998x10^-9 MeV, but I don't think this answer is right. Could someone explain this one to me? Thanks!

 

[KoGs]

Work = change in energy.

Does that help?

 

[DeadxBunny]

Oh, duh! I feel stupid lol.. I got it now. Thanks!

Work = change in energy.

Does that help?

 

[KoGs]

No problem. I love helping people feel stupid :)