Here's why:

* Force: A force is a push or pull that can cause an object to accelerate or change its shape.

* Net Force: The overall force acting on an object, considering both magnitude and direction.

* Equilibrium: A state where the net force acting on an object is zero. This means the forces are balanced, and the object will either remain at rest or continue moving at a constant velocity.

Example:

Imagine a tug-of-war. Two teams pull with equal force in opposite directions. The forces are equal and opposite, so the net force is zero. The rope remains stationary, demonstrating equilibrium.