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くHomework-1 Problem 25.73 l Review Part A Three 3.0 g balls are tied to 80-cm-long threads and hung from a single fixed point. Each of the balls is given the same charge q. At equilibrium, the three balls form an equilateral triangle in a horizontal plane with 20 cm sides What is ? Express your answer to two significant figures and include the appropriate units. q= Value Units Submit Request Answer Provide Feedback

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Consider a coordinate system (0,0,0) is point of fixatic charge q1 has position pl-(x1, 0, z), q2 has position p2-(-x2, y, z), q3 has position p3442, -y, z); from the equilateral triangle y 20/2 -10cm, x1 (2/3) 10 v3 cm; x2-(13)*10*v3 cm, From the Coulombs force on ql is, F-F2 +F3 r12- pl-p2, and r13-p1-p3, given r12 r13 20 cm-0.2 m; r12-61, o, z)-(-x2, y, z) -(10*v3, -10, 0) cm Thus r13-(x 1, 0, z)-(42,-y, z) (10*v 3, +10, 0) cmThus r1341, 0, z)-(42,-y, z) -(10*3, +10, 0) cm Therefore Fa(r12+r13) *q^2/(4π*ε0*t123) Coulombs force is equalized by gravi

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