Two postitive charges +Q are held at fixed distance d from each other. A particle of charge -q is placed at the mid point between them and given a small displacement y, on the line perpendicular to the line joining them and released. Show that hte particle described SHM of period [tex] (\frac{\epsilon_{0} m \pi^3 d^3}{qQ})^\frac{1}{2} [/tex](adsbygoogle = window.adsbygoogle || []).push({});

i drew a figure of what this might look like.

I was wondering if i had to prove that this particle is going to undergo SHM. I can easily say that at points +y and -y the force on the particle is the maximum and is [tex] \pm \frac{Qqd}{4 \pi \epsilon_{0} tan^2 \theta} [/tex]

would i then simply plug the acceleration of this force into th4e SHM equation??

But how would i get rid of the tan theta?? I doesnt appear in the answer they want.. after all.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Electric charges and SHM

**Physics Forums | Science Articles, Homework Help, Discussion**