Here's why:
* Newton's First Law of Motion: This law states that an object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity (speed and direction) unless acted upon by an unbalanced force.
* Balanced Forces: When forces acting on an object are balanced, they cancel each other out. This means there is no net force acting on the object. Since there's no net force, the object's motion remains unchanged.
Examples of Balanced Forces:
* A book sitting on a table: The force of gravity pulling the book down is balanced by the upward force of the table pushing on the book.
* A car moving at a constant speed on a straight road: The forward force from the engine is balanced by the force of friction and air resistance.
Important Note: Even though balanced forces don't change the motion of an object, they can still cause other effects. For example, a book on a table experiences balanced forces, but it still has weight due to gravity.
