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A charged ball with a mass of 30 grams is hung pendulum-like as shown (position is given in meters and time is given in seconds). A second ball with a negative charge of 3 mC is placed on a wood table. Play the animation and move the ball on the table toward and away from the pendulum. Restart. What is the charge on the pendulum? (Assume that the charge on the two balls is uniformly distributed.)
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