Electric Potential and Potential Difference

[ktobrien]

Homework Statement

Calculate the speed of a proton that is accelerated from rest through a potential difference of 135 V.
1 km/s
(b) Calculate the speed of an electron that is accelerated through the same potential difference.
2 Mm/s

Homework Equations

V=U/q

The Attempt at a Solution

(a)
Not sure how to do it

 

[rock.freak667]

Work done by electric field = kinetic energy of proton

 

[ktobrien]

Yea, I figured it out thanks.