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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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