* Increase the distance between them: The electric force is inversely proportional to the square of the distance between the charges. This means that if you double the distance, the force becomes four times weaker.
* Decrease the magnitude of either charge: The electric force is directly proportional to the product of the charges. This means that if you reduce the charge on either object, the force will decrease proportionally.
* Increase the permittivity of the medium between them: The electric force is inversely proportional to the permittivity of the medium surrounding the charges. A higher permittivity (like that found in water) weakens the electric force.
Let me know if you'd like a more detailed explanation of any of these!
