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Suppose the charge on the second ball is reduced slightly, so that it is less than that on the first ball.
Predict whether the angle that ball 1 makes with the vertical will be greater than, less than, or equal to the angle that ball 2 makes with the vertical. Explain. Sketch your answer above.
How does the free-body diagram for each ball in this case compare to the corresponding free-body diagram that you drew in part a? If the magnitudes or directions of any of the forces change, describe how they change.
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