How to find electric potential given only velocity

[jlmccart03]

Homework Statement

Given v = v=4.8×105m/s find the change in electric potential.

Homework Equations

ΔV = Vf-Vi = -W/q

The Attempt at a Solution

I really don't know any other formula that has the use of velocity to find ΔV. So how does velocity end up into the mix in finding ΔV?

 

[gneill]

There has to be more to the given problem than what you've written. A velocity alone says nothing about what the scenario is. What is the complete problem statement?

 

[jlmccart03]

There has to be more to the given problem than what you've written. A velocity alone says nothing about what the scenario is. What is the complete problem statement?

Here is a picture.

 

[berkeman]

Homework Statement

Given v = v=4.8×105m/s find the change in electric potential.

Homework Equations

ΔV = Vf-Vi = -W/q

The Attempt at a Solution

I really don't know any other formula that has the use of velocity to find ΔV. So how does velocity end up into the mix in finding ΔV?

Whelp, that post didn't go so well.

It's good to know that v=v, that's always a good start...

A potential difference produces an accelerating force on a charged particle, not just a "velocity" in isolation. There needs to be a lot more to this question that you haven't posted so far?

EDIT -- gneill beat me to it (again)...

 

[berkeman]

Here is a picture.View attachment 113222

Oh, that's a lot easier. What do you know about the units of energy "eV" (electron Volts) and how you express the kinetic energy of a moving electron...?

 

[jlmccart03]

Oh, that's a lot easier. What do you know about the units of energy "eV" (electron Volts) and how you express the kinetic energy of a moving electron...?

Well units of energy eV is 1.6*10^-19 J and KE = 1/2mv^2 for an electron.