Work performed on a proton between two charged plates

[KidDreamer]

Homework Statement

A set of parallel conducting plates are separated by .05 m. When the plates are fully charged to a potential difference of 20 V, how much work would have to be performed to move a proton from the negatively charged plate to the positively charged plate?

My second question would be, is it negative work because its moving a positive charge towards the positive plate?

Homework Equations

V = k*q/r
We = qV
V = Ed

The Attempt at a Solution

20 * ? I am sorry i just don't understand this concept that well

 

[rl.bhat]

Work = F*d*cosθ.
Here force on the proton is E*q away from the positive plate.
Proton is moving towards the +ve plate. So θ = 180 degrees.
With these information find W.

 

[KidDreamer]

Wait...so I understand it being 180 degrees...but i do i need to use the protons charge as 1.6*10^-16 to find the force applied first?

 

[rl.bhat]

Wait...so I understand it being 180 degrees...but i do i need to use the protons charge as 1.6*10^-16 to find the force applied first?

Yes.
The final formula will be
W = V*q*cosθ.