, where k is the coulomb's constant and r is the separation between the two charges.
The magnitude of the net force:
k = 9 × 109 N·m2/C2
The force due to charge Q1 is:
Pictured on the right are three-point charges Q1 = 21.4 μC, Q2 = -30.6 μC, and Q3 = 57.3 μC arranged according to the figure on the right. A fourth point charge is located at point A with a charge of QA = 13.5 μC. Calculate the magnitude of the net force on the charge at point A. The answer should be in N.
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