Welcome to our exploration of inertia! Inertia is one of the most fundamental concepts in physics. It describes the natural tendency of objects to resist changes in their motion. Simply put, an object at rest wants to stay at rest, and an object in motion wants to keep moving in the same direction at the same speed, unless something forces it to change.
Newton's First Law of Motion, also known as the Law of Inertia, formally describes this concept. The law states that an object at rest remains at rest, and an object in motion remains in motion with the same speed and direction unless acted upon by an unbalanced force. This means that without any external forces, a moving object will continue moving forever in a straight line at constant speed.