- #1

#### Gyroscope

## Homework Statement

An electron is accelerated from rest through a potential difference of V volts. What is the final velocity?

I did:

[tex]qV=\frac{mc^2}{\sqrt{1-\frac{v_f^2}{c^2}}}[/tex]

And solve for v, but I get an unreal answer. What am I doing wrong?!