Parallel Plates and Potential Difference

[Dayna]

Two parallel metal plates are separated by 1.5 cm and are maintained at a potential difference of 1200 V. A proton, initially at rest, is released from the poisitive plate. When it reaches the negative plate its speed is :

So i know that potential energy is Vq.
So i went 1200 V x 1.602 x 10-19, but I have no idea where to go from there.

Thanks!

 

[AJ Bentley]

Kinetic energy.

 

[Dayna]

Thanks a lot!