* Force: A force is a push or pull that can change an object's motion.
* Balanced Forces: When forces acting on an object are equal in magnitude and opposite in direction, they are considered balanced.
* Net Force: The net force is the overall force acting on an object. When forces are balanced, the net force is zero.
What happens with zero net force?
* At Rest: If an object is at rest, balanced forces will keep it at rest.
* Constant Velocity: If an object is already in motion, balanced forces will keep it moving at a constant velocity (same speed and direction).
In simpler terms: Imagine you're pushing a box with the same force as your friend is pulling it in the opposite direction. The box won't move because the forces cancel each other out.
Example:
* A book sitting on a table: Gravity pulls the book down, but the table pushes back with an equal and opposite force, keeping the book stationary.
* A car driving at a constant speed: The engine's forward force is balanced by air resistance and friction, resulting in no change in speed.
