Finding the speed of a proton accelerated through a potential difference

[nukeman]

Homework Statement

Ok here is the question: Image below:

Now the correct answer is: 1.63 x 10^7 m/s

I am not getting that. Look at the image below to see what I am getting, with my work.

Homework Equations

The Attempt at a Solution

 

[PeterO]

Homework Statement

Ok here is the question: Image below:

Now the correct answer is: 1.63 x 10^7 m/s

I am not getting that. Look at the image below to see what I am getting, with my work.

Homework Equations

So will the electron be speeding up or slowing down after it enters the Electric field.

Note: the problem is about an electron, but your title mentions "a proton question"?

The Attempt at a Solution

So will the electron be speeding up or slowing down after it enters the Electric field.

Note: the problem is about an electron, but your title mentions "a proton question"?