Newton's First 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 at a constant velocity unless acted upon by an external force.
Newton's First Law explains why objects do not spontaneously start moving or stop moving on their own. It also explains why we need seat belts in cars to prevent us from continuing to move forward when the car suddenly stops, and why it is easier to push a stationary object than to push an object in motion.
Some examples of Newton's First Law include a ball rolling down a hill, a book sitting on a table, and a person gliding on ice. In each case, the object will continue to move or stay at rest until an external force, such as friction or gravity, acts upon it.
Newton's First Law is important because it serves as the basis for understanding the concept of inertia, which is a fundamental property of matter. This law also lays the foundation for the other two laws of motion developed by Isaac Newton.
In order to solve problems involving Newton's First Law, we must identify the forces acting upon an object and determine whether they are balanced or unbalanced. If the forces are balanced, the object will remain at rest or continue moving at a constant velocity. If the forces are unbalanced, the object will accelerate in the direction of the net force.