Final answer:
Everything has energy and is subject to the laws of motion. Objects will remain stationary or move at a constant speed in a straight line unless acted upon by an external force, according to Newton's first law.
Step-by-step explanation:
Whether something is moving or sitting still, everything has got energy and can be described by the principles of motion. According to Newton's first law, an object will remain at rest or move at a constant speed in a straight line unless acted upon by an outside force. This state of motion describes an object's inertia, which is its resistance to changes in its state of motion. Objects in uniform motion have their position changing at the same rate, while stationary objects do not have their position changing at all.
When examining motion, we often look at variables such as whether the object is moving in a specific direction or if it is at rest. All objects, from tennis balls to planets, exhibit motion, which can include anything from linear motion at a constant velocity to simply remaining stationary. In both cases, the motion or lack thereof can only be changed by an external force as per Newton's first law, reflecting the causal relationship that must have been initiated by a First Cause at some point in the history of the universe.