Newton's First Law of Motion states that an object at rest will remain at rest, and an object in motion will continue in motion with a constant velocity, unless acted upon by an external force.
Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. In other words, the greater the force applied to an object, the greater its acceleration will be, and the more massive the object, the less it will accelerate.
Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. This means that whenever one object exerts a force on another object, the second object will exert an equal and opposite force back on the first object.
Newton's Laws of Motion are related in that they all describe the fundamental principles of motion and how objects behave when acted upon by forces. The First Law explains the concept of inertia, the Second Law explains the relationship between force, mass, and acceleration, and the Third Law explains how forces always occur in pairs.
Newton's Laws of Motion are applied in many real-world situations, from the motion of planets and satellites in space to the motion of objects on Earth. They are used to design and operate machines, vehicles, and structures, and to understand and predict the behavior of objects in different environments.