This describes a situation where a force is applied, but the object it acts upon doesn't move or change its motion. This is often called a balanced force. Here's a breakdown:

* Force: A push or pull that can change an object's motion.

* Balanced Force: When multiple forces act on an object, but their effects cancel each other out. This results in no net change in the object's motion.

Examples:

* Pushing a heavy box: If you push a heavy box with a force that is equal to the force of friction between the box and the floor, the box will not move. The forces are balanced.

* A book on a table: A book resting on a table experiences a downward force of gravity and an upward force from the table. These forces are balanced, so the book remains stationary.

* Pulling a rope in a tug-of-war: If two teams pull on a rope with equal force, the rope will not move. The forces are balanced.

Important Note: Even if an object doesn't move, it doesn't mean that no force is acting on it. Balanced forces simply mean that the forces are equal and opposite, resulting in no net change in motion.