Question
Two point charges Q1 = 74.3 ?C and Q2 = 19.3 ?C are fixed on the two ends of the diameter of a semi-circle with
Two point charges Q1 = 74.3 ?C and Q2 = 19.3 ?C are fixed on the two ends of the diameter of a semi-circle with a radius of r = 16.0 cm as shown in the figure. 
A massless point charge Q = 96.0 ?C can slide on the semi-circle without any friction. At which value of the angle ? will the point charge Q be in equilibrum?
Q r r 0 r Q
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College Physics
Authors: Raymond A. Serway, Jerry S. Faughn, Chris Vuille, Charles A. Bennett
7th Edition
9780534997236, 495113697, 534997236, 978-0495113690
