Question

Three charged particles of q1 = 30.0 nC, q2 = -30.0 nc, and q3 = 15.0 nC are placed on the y-axis, as shown in the figure.


Three charged particles of q1 = 30.0 nC, q2 = -30.0 nc, and q3 = 15.0 nC are placed on the y-axis, as shown in the figure. 

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Charge q1 has the coordinates (0, 12.0 cm), q2 has the coordinates (0, -12.0 cm), and q3 is located at the origin. 


(a) Find the electric potential energy in J) of the configuration of the three fixed charges. 

(b) A fourth particle, with a mass of 1.74 x 10-13 kg and a charge of q4 = 60.0 nc, is released from rest at the point (9.00 cm, 0). Find its speed in m/s) after it has moved freely to a very large distance away. 

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