Forces between Charges
Electrostatic forces MUCH stronger than gravity:
Electrostatic: FE = K q1q2 / R2
Gravity: FG = G m1m2 / R2
In meter- Kg - second system: K = 9.0 x 109 G = 6.67 x 10-11
Force between two protons at distance of 1 m: Charge = 1.6 x 10-19 Coulomb Mass = 1.6 x 10-27 Kg FE = 2.3 x 10-28 Newtons; FG = 1.8 x 10-64 Newtons