Newton's 1st law, also known as the law of inertia, states that an object at rest will remain at rest and an object in motion will remain in motion with a constant velocity unless acted upon by an external force.
Newton's 1st law can be observed in many everyday situations, such as a book remaining on a table until someone picks it up or a car continuing to move forward even after the accelerator is released.
Mass is directly related to inertia in Newton's 1st law. The greater the mass of an object, the greater its inertia, meaning it will require more force to change its state of motion.
No, Newton's 1st law is a fundamental principle in physics and cannot be broken. It has been observed and proven through countless experiments and is a cornerstone of classical mechanics.
Newton's 1st law is closely related to the concept of equilibrium, which is a state of balance and no change in motion. In an equilibrium state, all forces acting on an object are balanced, and Newton's 1st law dictates that the object will remain in this state unless acted upon by an external force.