Quantum Physics || Astrophysics & Space on Instagram: "Newton’s first law states that an object remains at rest or continues to move in a straight line at a constant speed unless acted upon by an external unbalanced force. In simple terms, objects resist changes to their state of motion — this tendency is called inertia. For example, a book on a table stays still until someone pushes it, and a moving car continues to move until brakes or friction slow it down. This law forms the foundation for u