University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Chapter 21, Problem 21.62P
CP Two identical spheres with mass m are hung from silk threads of length L (Fig. P21.62). The spheres have 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. Show that if the angle θ is small, the equilibrium separation d between the spheres is d = (q2L/2π∈0mg)1/3. (Hint: If θ is small, then tanθ ≅ sinθ.)
Figure P21.62
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University Physics (14th Edition)
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