Here's a breakdown:

* Electrostatic Force: This is the force that exists between electrically charged objects. It can be either attractive (opposite charges) or repulsive (like charges).

* Like Charges: These are charges with the same sign (either both positive or both negative).

* Repulsion: This means the force pushes the objects away from each other.

Why does this happen?

The fundamental principle behind electrostatic repulsion is that like charges repel each other. This repulsion arises from the interaction of electric fields created by the charges. When two like charges are brought close together, their electric fields interact in a way that creates a force pushing them apart.

Examples:

* Static Electricity: When you rub a balloon on your hair, the balloon acquires a static charge. If you then bring the balloon near another object with the same charge, they will repel each other.

* Electromagnetism: Electric currents create magnetic fields, and the interaction of these fields can also lead to repulsive forces between like charges.

Let me know if you'd like to delve deeper into the explanation of electric fields or the mathematical formula for electrostatic force!