- #1
mickellowery
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Homework Statement
Two identical particles, each having a charge of +q are fixed in space and separated by a distance d. A third particle with charge -Q is free to move and lies initially at rest on the perpendicular bisector of the two fixed charges a distance x from the midpoint between the two fixed charges. Show that if x is small compared with d, the motion of -Q is simple harmonic along the perpendicular bisector. Determine the period of that motion. How fast will the charge -Q be moving when it is at the midpoint between the two fixed charges if it is initially released at a distance a << d from the midpoint?
Homework Equations
Fe= ke[tex]\frac{(q_1)(q_2)}{r^2}[/tex]
-kx=max I'm not completely sure if I need this one, but the problem wants me to show that -Q is simple harmonic so I was thinking that I might need to set these equal to each other somehow, but I'm absolutely lost as to where to go.