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An earlier chapter of the study dealt with the variety of ways in which movement can be described (words, graphs, tables, numbers, etc.). In this unit (Newton`s laws of motion), the possibilities of explaining motion are discussed. Isaac Newton (a 17th century scientist) established a variety of laws that explain why objects move (or don`t move) the way they do. These three laws are known as Newton`s three laws of motion. Lesson 1 focuses on Newton`s first law of motion – sometimes called the law of inertia. The water spills when the state of movement of the container is changed. The water resisted this change in its own state of movement. Water tended to “keep doing what it did.” The container was brought at a high speed to the starting line; The water remained calm and flowed onto the table. The container was stopped near the finish line; The water continued to move and poured onto the front edge of the container.
The container was forced to move in a different direction to get around a curve; The water continued to move in the same direction and sway on its edge. The behavior of water during the lap around the track can be explained by Newton`s first law of motion. Sir Isaac Newton published three laws in the 17th century. Newton`s first law of motion is an introduction to the motion of an object and the force acting on it. In other words, it deals with the movement of an object and its relationship to force. In this article, let`s learn in detail Newton`s 1st law of motion. The idea of cause and effect is crucial to accurately describe what happens in different situations. For example, consider what happens to an object sliding along a rough horizontal surface.
The object stops quickly. When we spray the surface with talcum powder to make the surface smoother, the object continues to slip. If we make the surface even smoother by rubbing lubricating oil on it, the object will slide even further. By extrapolating to a frictionless surface, we can imagine how the object glides indefinitely in a straight line. Friction is therefore the cause of slowing down (according to Newton`s first law). The object would not slow down at all if the friction was completely eliminated. Think of an air hockey table. When the air is cut off, the washer only slides a short distance before friction stops it. However, when the air is turned on, an almost frictionless surface is created and the washer slides long distances without slowing down. Plus, if we know enough about friction, we can accurately predict how quickly the object will slow down. Friction is an external force. Newton`s laws of motion relate the motion of an object to the forces acting on it.
In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass multiplied by its acceleration. In the third law, when two objects interact, they exert forces of equal size and opposite direction. Experience suggests that a stationary object remains at rest when left alone, and that a moving object tends to slow down and stop unless efforts are made to keep it moving. However, Newton`s first law of motion states: There is an important condition that must be met for the first law to be applicable to a particular motion. The state is given by the sentence.” unless they are fought by an unbalanced force.” As long as the forces are not unbalanced – that is, as long as the forces are balanced – the first law of motion applies. This concept of balanced and unbalanced strength will be discussed in more detail later in Lesson 1. The ancient Greek philosopher Aristotle believed that all objects have a natural place in the universe: that heavy objects (such as stones) wanted to rest on earth, and that light objects such as smoke wanted to rest in the sky and the stars wanted to stay in the sky. He thought that a body was in its natural state when it was at rest, and in order for the body to move in a straight line at a constant speed, an external agent constantly pushed it, otherwise it would stop moving. However, Galileo realized that a force is needed to change the speed of a body, but no force is needed to maintain its speed. Galileo explained that a moving object will continue to move in the absence of a force. (The tendency of objects to resist changes in motion was what Johannes Kepler called inertia.) This idea was refined by Newton, who made it his first law, also known as the “law of inertia”: no force means no acceleration, and therefore the body will maintain its speed.
Since Newton`s first law is a reformulation of the law of inertia that Galileo had already described, Newton gave Galileo the appropriate credit. The property of a body to remain at rest or to remain in motion at a constant speed is called inertia.