Here's why:
* Forces are vectors: Forces have both magnitude (how strong they are) and direction.
* Opposing forces: Opposing forces act in directly opposite directions.
* Net force: When forces act on an object, the net force is the overall effect of all the forces combined.
Example:
Imagine you're pushing a box with a force of 10 Newtons to the right. Someone else is pushing the box from the opposite side with a force of 10 Newtons to the left. The forces are equal in magnitude and opposite in direction. Therefore, the net force on the box is zero, and the box will remain stationary.
This concept is known as equilibrium. When the net force on an object is zero, the object is in equilibrium, meaning it's either at rest or moving at a constant velocity.
