1. The problem statement, all variables and given/known data What are the strength and direction of an electric field that will balance the weight of a 1.0g plastic sphere that has been charged t0 -3nC ? 2. Relevant equations E= F/q 3. The attempt at a solution Newton's laws on the charged sphere ƩFnet(y) = F -mg=0 F=mg\ F=qE E = mg/q =[(0.003kg)(9.8m/s^2)]/(3.0x10^-9C) =3x10^6 N/c how do i conclude on the direction?