1. The problem statement, all variables and given/known data A small latex sphere experiences an electric force of 3.6 × 10^−14 N when suspended halfway between a pair of large metal plates, which are separated by 48.0 mm. There is just enough electric force to balance the force of gravity on the sphere. (a) What is the mass of the sphere? 2. Relevant equations q = (mgΔd)/V F (electrostatic force) = kq/r^2 3. The attempt at a solution I have two unknowns in my first equation, q and V. My attempt to find q fails because I get a number that is around 10^-27. So if my number for q is wrong, then my number for V will also be wrong.