Electrostatics

Forces

Coulomb's Law

F=k(q1q2)/r2

k=8.99x109 Nm2/C2

Likes repel (+F)

Opposites Attract (-F)

Electric Fields

Field Lines

Move from Positive to Negative

Never Cross

More lines = stronger field

E=F/q

|E|=1/(4πε0)

Energy

Methods of charging

The forces exerted on a charge are determined by the net field acting on the charge at that location.