Newton’s third law of motion

Newton first introduced his laws in Philosophiae Naturalis Principia Mathematica (1687), also known as the Principia. 

In 1543, Nicolaus Copernicus proposed that the Sun rather than Earth might be at its centre, rather than the Earth. Since then, Galileo, Kepler, and Descartes have laid the basis for a new science that will replace the Aristotelian worldview and explain heliocentric universe workings. Newton invented it in the Principia. To describe why the celestial bodies are ellipses rather than circles, he developed his three laws. However, it turned out that he explained much more than he originally intended. The Scientific Revolution refers to the events between Copernicus and Newton.

Throughout the 20th century, Newtonian physics was supplanted by quantum mechanics & relativity. On the other hand, Newton’s laws continue to accurately describe nature, except for tiny and fast-moving objects like electrons.

Newton’s third law of motion:

You have presumably already figured out that the Earth’s gravitational attraction is exerted on you. You may not realize it, but you are also pulling the Earth up towards you. For instance, if the Earth’s gravity pulls you down with a force of 300 N, you will also be pulling the Earth up with a force of 300 N. Using Newton’s third law, we can explain this amazing fact.

 Newton’s third law states that when an object (A) exerts a force on (B), that same force must be applied on (A) in the reverse direction.

Newton’s third law states that when two bodies interact, they exert forces on one another that are equivalent in magnitude and opposite in direction. Newton’s third law is also known as the law of action and reaction. Static equilibrium, where all forces are equal, is analyzed using this concept, but it also applies to bodies moving at a constant speed or acceleration. Those factors are genuine, not just accounting gimmicks. 

For example, an object weighted down by its weight, such as a book on a table, exerts a downward force proportional to its weight. The book is subjected to the same force as the table as per the third law. As a result, the table deforms somewhat because of its weight, causing it to press back on the book like a spring.

The second law states that if a body is subject to a net force, its motion will be accelerated. The net force is absent on a body, either since there are no forces or because all forces are balanced adequately by opposing parties. Therefore the body does not accelerate and can be described as being in equilibrium. Similarly, if a body is observed not to be accelerating, it can be concluded that there is no net force exerted on it.

Explanation of Newton’s third law of motion:

Stubbing your toe is a painful experience because the surface you stub it on exerts a force back on your toe, even though your toe initiated the collision. Even if your first reaction is probably “that hurt” rather than “this is an excellent example of Newton’s third law,” both statements are accurate nonetheless.

Every time a force is exerted upon an object, each object experiences a force of the same strength but inversely proportional to that force’s direction of travel. Newton’s third rule can be seen in action in the most mundane activities, such as stubbed toes and ball throws. According to Newton’s third law of motion, when one thing exerts a force on another item, the first object receives a force of the same magnitude and opposite direction.

According to Newton’s third law, forces are always in pairs, and one item cannot exert pressure on another without receiving the equivalent energy in return. Sometimes these force pairs are described as “action and response pairs,” in which a person’s actions are matched by their reactions (although depending on your point of view). External forces can be identified using Newton’s third law. When setting up a problem, remember that recognizing external forces is critical since the external forces must be combined to find the net force.

Look around, and you will see Newton’s third law in action: Swimmers launching themselves from the side of a pool, they use their feet to push against the pool wall and then accelerate in the opposite direction of their push. The swimmers have thus been subjected to a force of comparable size but in the opposite direction of their inspiration from the wall. There is a tendency to imagine that two forces of identical magnitude but acting in opposite directions would cancel each other out; however, this is incorrect.

It is possible to inspect either the swimmer or the wall in this situation. Fall on the swimmer’s feet is an external force that influences the swimmer’s motion if the swimmer is the system of interest. Due to the swimmer’s acceleration, they move parallel to the wall’s path. Feet on the wall is irrelevant because the swimmer is our system (or object of interest) and not a passive object being acted upon by the swimmer. As a result, the system’s motion is unaffected by the feet on the wall and does not cancel falls on feet. 

Examples of Newton’s third law of motion:

Consider a bird’s flight motion. With its wings, a bird can fly. Air is pushed downward by a bird’s wings. The bird is being caused upwards by the air because forces are mutually dependent. Equal and opposing pressure on the air and bird is exerted on each other, resulting in an equal and opposing force on the bird. Every action has a corresponding reaction similar in size and opposite in direction. Birds can fly thanks to action-reaction force pairings.

Assume you are driving your child to school. The wheels of a car are made to rotate. The road is pushed backwards by the wheels as they revolve. The wheels must be experiencing a force in the forward direction since forces are the product of mutual interaction. An equal and opposite reaction exists for every action. Reaction-reaction force pairings enable cars to go on roadways.

Conclusion:

Force is represented as a push or pull on an object that causes it to interact with another object. Force is the result of an encounter. Force is divided into contact force (such as frictional force) and non-contact force (gravitational force). Newton’s third law states that when two bodies interact, they produce forces on one another that are equal in magnitude and opposite in direction.