PHYSICS 240 Study Guide - Free Body Diagram, Net Force, Binomial Theorem
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Physics 240 discussion 11 september 3, 2007 section ____ group ____ 4. ___________________________: two positive point charges q are held fixed on the x-axis at x=a and x=-a. A third positive point charge q, of mass m, is placed on the x-axis away from the origin at a coordinate x such that |x| << a. The charge q, which is free to move along the x axis, is then released. a) find the frequency of oscillation of the charge q. (hint: review the definition of simple harmonic motion in section 13-3. Explain your answer: two identical spheres of mass m are hung from silk threads of length l, as shown in the figure. Each sphere has the same charge, so q1 = q2 = q. The radius of each sphere is very small compared to the distance between the spheres, so they may be treated as point charges.
