What Forces Have You Experienced That Follow the Inverse Square Law?

[Inquiring_Mike]

This question came up in my textbook : Describe an example of a force you have experienced that follows the inverse square law. I couldn't think of any that I have "experienced", since I don't think that I have "experienced" the force of gravity that shows it is a inverse relationship.

 

[redrogue]

The electric force in Coulomb's Law also adheres to the inverse square law and is one that you've experienced if you've ever been shocked (i.e. static electricity).

\vec{F}_{21}=k\frac{Q_{1}Q_{2}}{r^2} \hat{r}_{21}