A point charge q = -0.5nC is fixed at the origin. Where must a proton be placed in order for the electrical force acting on it to be exactly opposite its weight?
The Attempt at a Solution
Trying to solve for distance (r), but coming across a few problems;
If the force acting on it is exactly opposite its weight, does this make F=0?
should I be substituting 0 for F?
Where would I substitute -0.5? in q1 or q2?
And what would I place in the other?