Physics
Coulomb's Law
Electrostatic force between two charges.
Formula
Formula
F = k q1 q2r2
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| q₁, q₂ | charges (C) | computed result | — | result |
| r | separation (m) | real number (ℝ) | m | input |
| k | 8.99×10⁹ | computed result | — | result |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givenq₁ (C) = 0.000001, q₂ (C) = 0.000002, r (m) = 0.05
Result7.19004143
Example 2
Givenq₁ (C) = 1e-9, q₂ (C) = 1e-9, r (m) = 0.01
Result0.00008987551787