You're asking about Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. This means that forces always come in pairs.

Here's how it works:

* Force 1 (Action): This is the initial force applied by one object on another.

* Force 2 (Reaction): This is the equal and opposite force applied by the second object back on the first.

Examples of balanced forces:

1. You pushing on a wall: You apply a force on the wall (action), and the wall pushes back on you with an equal and opposite force (reaction). You don't move, because the forces are balanced.

2. A book resting on a table: The book exerts a downward force due to gravity (action). The table exerts an equal and opposite upward force on the book (reaction). The book stays stationary because the forces are balanced.

Important Note: These forces act on different objects. They don't cancel each other out within the same object.