- #1
Lydia22
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Homework Statement
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 ?
Homework Equations
E= F/q
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?