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Near the surface of the Earth there is an electric field of about V=150 V/m which points downward. Two identical balls with mass m= 0.550 kg are dropped from a height of 2.30 m, but one of the balls is positively charged with q1= 800 microCoulombs , and the second is negatively charged with q2= -800 microCoulombs.
Use conservation of energy to determine the difference in the speed of the two balls when they hit the ground. (Neglect air resistance.)

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