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OCR: Net Force The result from adding up several forces from different directions acting on a system. If the ystem experiences a i change in i its motion, it is said to have a net i i force acting upon it. In this case, the forces acting on the body are not balanced. They do not cancel each other out. If the system does not experience change in motion after these forces are applied to it, then the net force is said to be zero. The forces are balanced and do cancel each other out, Newton : The Sl unit for force Newton's First Law of Motion : An object will tend to emain motionless or to have uniform motion in the absence of a a force acting on it. This is also called the Law of Inertia balancec