After brushing, Fluffy's fur has a charge of +8.0 x10^-9 coulombs and her plastic brush has a charge of -1.4 x10^-8 coulombs. If the distance between the fur and brush is roughly 5.0 * 10^-1 meters, what is the approximate magnitude of the force between them?
(k = 9.0 x10^9 newton·meters^2/coulomb^2)

Question

After brushing, Fluffy's fur has a charge of +8.0 x10^-9 coulombs and her plastic brush has a charge of -1.4 x10^-8 coulombs. If the distance between the fur and brush is roughly 5.0 * 10^-1 meters, what is the approximate magnitude of the force between them?
(k = 9.0 x10^9 newton·meters^2/coulomb^2)

anonymous · Answer

$$F=9x10^9(Q1Q2)/D^2$$ 
with Q1 and Q2 as the charges and D^2 as the distance between them
coulombs law