Q. Four charges Aq,Bq,Cq, and Dq (q = 3.00 × 10-7C) sit in a plane at the corners of a square whose sides have length d = 84.0 , as shown in the diagram below. A charge, Eq, is located at the origin at the center of the square. DATA: A = 8, B = 6, C = 5, D = 4, E = 4. Consider the charge at the center of square. What is the net force, in the x-direction on this charge?

Q. A 13g rifle bullet traveling 150m/s buries itself in a 3.7 kg pendulum hanging on a 2.9 m long string, which makes the pendulum swing upward in an arc. Resolve the horizontal component of the pendulum's maximum displacement.