3. The point charge at the bottom of the figure is Q= +4.9 nC, and the curve is a circular arc of radius 5.0 cm. Ignore the weights of the charges. a. Draw a free-body diagram of the charge Q. b. What is the net force on the charge O due to the other point charges shown? Give magnitude and direction. --6.0 nC 2.0 nC 2.0 nC 5.0 cm 45° 45° 5.0 cm

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