Electric Field #3?

Question

A Sytrofoam® ball covered with a conducting paint has a mass of 6.0 10-3 kg and has a charge of 3.0 µC. What electric field directed upward will produce an electric force on the ball that will balance its weight?

Answer 1

Force equals charge times electric field. Do the math.

Answer 2

E = F/q
F = Eq
Net F = 0
Eq - mg = -
Eq = mg
E = mg/q
= (6x10^-3)(9.8)/(3.0)
0.0196