What is another name for the first law of motion?

The first law of motion, often referred to as the law of inertia, states that an object at rest will remain at rest, and an object in motion will continue in motion at a constant velocity unless acted upon by a net external force. This principle underscores the concept that it is the nature of objects to resist changes in their state of motion. Inertia is the property of matter that quantifies this resistance; the more mass an object has, the more inertia it possesses.

Recognizing this law is fundamental in understanding basic physics and dynamics in robotics, as it explains why robots require forces to change their motion or direction. This law lays the groundwork for further exploration into the other laws of motion and the principles governing forces, acceleration, and gravity, but it is specifically the law of inertia that highlights an object's inherent tendency to maintain its state unless a force induces a change.