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

A 14.5 cm-radius thin ring carries a uniformly distributed 13.6 uC\ charge. A small 6.1 g sphere with a charge of 5.0 uC is placed exactly at the center of the ring and given a very small push so it moves along the ring axis (+ x axis).

How fast will the sphere be moving when it is 1.9m from the center of the ring (ignore gravity)?

2. Relevant equations

F=ma

F=k * Q1Q2/r^2

vf^2 = vi^2 + 2ad

3. The attempt at a solution

I set the two force equations equal to each other, and found an expression for the acceleration using .145m as r, and plugged that into the third equation and got an answer of 134. Needless to say, this wasn't the correct answer.

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# Homework Help: Need help with electric force and velocity.

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