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Question: Two identical point charges (q = +9.20 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.660 m. A test charge (q0 = -4.10 x 10-8 C), with a mass of 4.00 x 10-8 kg, is released from rest at one of the corners of the square.

Part I: Determine the speed of the test charge when it reaches the center of the square?

I have been stuck on this question for a long time, please help. Show steps. Thanks!

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