The sum of two or more forces acting on a single object is called the net force.

Here's a breakdown:

* Force: A push or pull that can cause a change in an object's motion (either starting, stopping, or changing direction).

* Net force: The overall force acting on an object. It's the vector sum of all individual forces. This means we consider both the magnitude (strength) and direction of each force.

How to find the net force:

1. Draw a free body diagram: This is a diagram that shows all the forces acting on an object.

2. Choose a coordinate system: This helps with adding forces in the same direction and subtracting forces in opposite directions.

3. Add the forces vectorially: This means considering both magnitude and direction. You might need to use trigonometry or other tools for this.

Important Note: The net force determines an object's acceleration. A larger net force leads to a larger acceleration.