Two identical point charges (q = +
7.30 10-6 C) are fixed at diagonally
oppositecorners of a square with sides of length 0.500 m. A test
charge (q0 = -2.65 10-8 C), with a mass of 6.00 10-8 kg, is released from rest at one ofthe
empty corners of the square. Determine the speed of the testcharge
when it reaches the center of the square.