1. The problem statement, all variables and given/known data The figure shows two 5.0 g spheres suspended from 1.0-m-long threads. The spheres repel each other after being charged to +91 nC. What is the angle θ ? 2. Relevant equations I was thinking momentum and/or kinetic energy equations. k = 1/2 mv^2 p = mv F = ma 3. The attempt at a solution Answer is: 4.1 degrees I am not sure how to go about this problem other than from the equations I have already given.