(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A charge of 2.9*10^-6C is held fixed at the origin. A second charge of 2.9*10^-6 C is released from rest at the position (1.15m, 0.550m). And the mass of the second charge is 2.10 g.

At what distance from the origin does the 2.9*10^-6 charge attain half the speed it will have at infinity?

2. Relevant equations

KE (final) = Potential Energy (initial) - PE (final)

3. The attempt at a solution

There was a part A to this question where I figured out the speed it had at infinity. For the second part, I tried to just solve for r using the same equation but it doesn't work. Any tips?

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# Homework Help: Another Electric Potential Problem

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