Here's what that means:
* Forces have both magnitude and direction. A force is a push or pull. It has a strength (magnitude) and a direction (up, down, left, right, etc.).
* Forces can cancel each other out. If two forces of equal magnitude act on an object in opposite directions, they cancel each other out.
* Net force is the overall force. It's the sum of all the forces acting on an object, taking into account their direction.
When the net force is zero, the object is in one of the following states:
* At rest: The object is not moving.
* Moving at a constant velocity: The object is moving in a straight line at a constant speed.
Examples of balanced forces:
* A book sitting on a table: The force of gravity pulling the book down is balanced by the normal force of the table pushing the book up.
* A car driving at a constant speed: The force of the engine pushing the car forward is balanced by the forces of friction and air resistance acting against it.
Remember: Even if an object is moving, it can still have balanced forces acting on it.
