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 ?
I was thinking momentum and/or kinetic energy equations.
k = 1/2 mv^2
p = mv
F = ma
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.