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## Homework Statement

An alpha particle has a charge of 2e and is fixed at the origin. A proton is located 2.00x10^-8 m from the alpha particle along the x-axis. When the proton is released, what is its speed at a great distance from the alpha particle

q = 2e

r = 2.00x10^-8

v = ?

## Homework Equations

**ɛ**= kq / r

**ɛ**= ΔV / r

ΔE = qΔV

E = kq1q2 / r

## The Attempt at a Solution

I have no idea how to start this one. As every way I can think of doing it results in missing information that is needed to solve for v. For example when I tried to solve for

**ɛ**and then use it to solve for ΔV, and use that to solve for ΔE, I get stuck with E

_{E}= E

_{K}but no mass to solve for v.

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