Physics - Electricity - Static - Coulomb's law - Coulomb's Law
A 4-step lesson. Step 1: 'Coulomb's Law: F = kq₁q₂/r². The force between two point charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.' k = 8.99×10⁹ N·m²/C² ≈ 9×10⁹. Also written as k = 1/(4πε₀). Step 2: 'Direction: Like char