Moving objects tend to stay moving. This is Newton`s simplest law and is generally called inertia. Inertia means that once an object takes off in a certain direction, it needs equal or greater force to prevent it from moving. When a car is driving in a certain direction, it needs a force equal to or greater than that of the car to stop its movement, like a car moving with the same force in the opposite direction. There are many other applications of Newton`s first law of motion. Several applications are listed below. Perhaps you could think about the law of inertia and provide explanations for each application. Example: Imagine a standing passenger on a bus traveling at constant speed on a right-hand highway. If the driver brakes suddenly, the front passenger is thrown forward. According to Newton`s first law of motion, the passenger maintains his state of constant speed unless he is affected by an external force.
In order not to be thrown forward, the passenger tries to grab part of the bus to hold it. There are many applications of Newton`s first law of motion. Consider some of your experiences in an automobile. Have you ever observed the behavior of coffee in a coffee cup filled to the brim when starting a car in standby or stopping a car in a state of motion? Coffee “continues to do what it does.” When you accelerate a car from a stop, the road provides an unbalanced force on the spinning wheels to push the car forward. But the café (which was at rest) wants to stay calm. As the car accelerates, the coffee stays in the same position; Then the car accelerates under the coffee and the coffee spills on your lap. On the other hand, during braking, the café advances from a state of movement at the same speed and in the same direction, to finally hit the windshield or dashboard. The coffee in motion keeps moving.
An object that remains at rest remains at rest, and an object that is in motion remains in motion until a force acts on it. In developing his three laws of motion, Newton revolutionized science. Newton`s laws, as well as Kepler`s laws, explain why planets move in elliptical orbits rather than circles. Figure C: A terrestrial body falls towards the surface of the Earth. When the body falls, it is attracted to the earth or pulled from the earth. Since we cannot see the movement of the Earth, the possibility of a force acting on the Earth does not come to mind. Sir Isaac Newton worked in many areas of mathematics and physics. He developed the theories of gravity in 1666, when he was only 23 years old.
In 1686, he presented his three laws of motion in the “Principia Mathematica Philosophiae Naturalis”. Newton`s first law states that any object remains in a straight line at rest or in constant motion, unless it is forced to change state by the action of an external force. This tendency to resist changes in a state of motion is inertia. There is no net force acting on an object (when all external forces cancel each other out). Then the object maintains a constant speed. If this speed is zero, the object remains at rest. When an external force acts on an object, the speed changes due to the force. Example 1: A marathon runner cannot stop running immediately after crossing the finish line. He has to take a few more steps and cross the finish line a few meters, otherwise he will fall. This is due to the inertia of motion, or Newton`s first rule of motion, which prevents the body from stopping abruptly, forcing it to maintain its state of motion.
Figure A above shows a block moving to the right at an initial velocity of vo. When the force F is directed to the left of the block, the speed is increased, but the direction of motion is not changed. This applies whenever the force goes in the same direction as the speed. According to Newton, there are three laws of motion. The first reads: “Any object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. The second law reads: “The relationship between the mass M of an object and the acceleration A and the applied force F is F = MA. Acceleration and force are vectors, and in this case, the direction of the force vector is the same as the direction of the acceleration vector. And the third law is: “For every action, there is an equal and opposite reaction.” Newton`s first law of motion states that an object remains in a straight line at rest or in constant motion, unless it is affected by an external force.
Example 1: A ball, when hit, develops some acceleration. The force allocated to the ball is directly related to the acceleration of the ball. This means that the harder you hit the ball, the faster it moves and shows Newton`s second law of motion in everyday life. 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 frictional force cannot be eliminated in any object. Even an object like a plane flying in the air encounters air resistance. Therefore, objects do not move continuously if no force acts on the body.
Once a body is set in motion, it eventually stops due to the delaying frictional force. However, according to Galileo`s thought, sometimes friction may be absent, in which case a body that is already moving will continue to move indefinitely at a constant speed along a straight line. In the 16th century, Galileo contributed significantly to the rapid progress of science, especially mechanics.