👉 Masslessness is a fundamental principle in physics that states that an object has no intrinsic or apparent inertia, meaning it does not resist changes in its state of motion due to external forces. In other words, objects with mass have zero resistance when subjected to forces and are always at rest or move in straight lines under the influence of gravity. This concept is fundamental because it allows us to understand how objects behave in various situations such as falling objects, rockets launching, and spinning objects like planets. Masslessness enables
