Newton's Third (3rd) Law of Motion - Concept and Examples
Channel: Physics Partner
Date: 2023-04-20

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NOTES FOR STUDIES

Newton's third law of motion is known as the principle of action and reaction. It states that for every action, there is an equal and opposite reaction. This law is essential to understanding how objects move and interact with one another.

In simpler terms, Newton's third law means that the forces acting on two objects are always equal in magnitude but opposite in direction. This law also implies that whenever an object exerts a force on another object, the second object will exert an equal and opposite force on the first object.

An example of Newton's third law in action can be seen in the game of billiards. When the cue ball strikes another ball, the force of the cue ball hitting the second ball is equal in magnitude to the force of the second ball pushing back against the cue ball. This principle results in the movement of the balls.

Another example of the third law of motion can be seen when a person tries to push open a door. In doing so, they are exerting a force on the door. According to the third law of motion, the door exerts a force back against the person trying to push it, making it difficult to open the door.

In space, Newton's third law of motion plays a crucial role in rockets and spacecraft's propulsion. The spacecraft exerts a force on the exhaust gases, propelling it forward, and the exhaust gases exert an equal and opposite force on the spacecraft, causing it to move in the opposite direction. It is the same principle that allows a rocket to launch into space.

In conclusion, Newton's third law of motion is an integral part of our understanding of how objects move and interact with one another. From the game of billiards to space travel, this law is fundamental to our understanding of the physical world and how it works. By understanding and applying Newton's third law, we gain insight into the forces affecting our lives and how we can harness them to propel us forward.

Furthermore, Newton's third law of motion has practical applications in various fields such as engineering, architecture, and sports. Engineers use this law to design structures that can withstand external forces, while architects use it to create buildings that can withstand natural disasters. Athletes also use this law to their advantage by applying force in the opposite direction to gain momentum and achieve their goals. In essence, Newton's third law of motion is not just a theoretical concept but a practical tool that helps us navigate and manipulate the physical world around us.