Welcome to Newton's Laws of Motion. These three fundamental laws, formulated by Sir Isaac Newton, describe how objects move and interact with forces. The first law deals with inertia, the second law relates force to acceleration, and the third law describes action and reaction pairs.
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 continue moving at constant velocity in a straight line, unless acted upon by an unbalanced external force. This means objects naturally resist changes to their state of motion.
Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This is expressed by the famous equation F equals m times a. The greater the force applied, the greater the acceleration. The greater the mass, the smaller the acceleration for the same force.
Newton's Third Law states that for every action, there is an equal and opposite reaction. This means that forces always come in pairs. When you push on a wall, the wall pushes back on you with equal force. When a rocket expels gas downward, the gas pushes the rocket upward with equal force.
To summarize Newton's Laws of Motion: The first law describes inertia and how objects resist changes in motion. The second law quantifies the relationship between force, mass, and acceleration. The third law explains that forces always occur in pairs. Together, these three laws form the foundation of classical mechanics and help us understand motion in our everyday world.