A small ball with a mass of 412 g and a charge of 455 mc is, Ask an Expert

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A small ball with a mass of 4.12 g and a charge of 4.55 mC is located at a distance 77.9 cm above the ground in a uniform electric field of 11.5 N/C directed to the east. The ball is then released from rest. What is the speed of the ball after it has moved downward a vertical distance of 31.2 cm?

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