Q. Two identical point charges (q = +5.20 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.490 m. A test charge (q0 = -6.70 x 10-8 C), with a mass of 5.70 x 10-8 kg, is released from rest at one of the corners of the square. Determine the speed of the test charge when it reaches the center of the square.
Q. Two small objects, A and B, are fixed in place and separated by 2.15 cm in a vacuum. Object A has a charge of +0.821C, and object B has a charge of -0.841C. How many electrons must be removed from A and put onto B to make the electrostatic force that acts on each object an attractive force whose magnitude is 23.6 N?