Was newton third law have any defect?

Answer 1

Yes, it has. According to Newton's 3rd law of motion, action and reaction are equal in magnitude but opposite direction given that friction is removed. But we need to understand why the reaction happens. Here I tell u:

1. When we exert a force on an object, then energy is transmitted from our body to that object. According to the laws of physical chemistry, every system tends to keep its energy consistent relative to the atmosphere. Here the point comes. When an extra energy enters this system, this system to remain stable should have to lose this energy otherwise it will collapse and that's why reaction happens.

2. About the defect now, Newton says that there should be no resistance but we can't ignore resistance even in ideal conditions. I just want to say that this reaction occurs due to resistance of that system. The system tries to resist the external extra energy, which means it resists the external force. This is necessary to remain stable otherwise with no resistance system will collapse and how will the reaction occur if the system collapses? An example is when we apply extreme force on a body. Since there is a limit to this resistance by the body, when an extreme force is applied it can't show much resistance and is crushed into pieces. The reaction in such a case is not a strong one, the system becomes unbalanced and unstable and thus collapses. Another example is of a rubber band. Note that the resistance I am talking about is not parallel to the surface of the system but it acts within the particles of the system due to electronic repulsion, energy consistency and atomic or molecular bonds.

3. Another defect is in the flow of energy in a medium it is not one directional. Energy travels in the form of waves in all directions but not equally. When we apply a force on a system energy is transferred to it. As I mentioned before, to remain stable it has to lose this energy in any case but this energy do not travels just back but is transferred to the surrounding all over in every direction. Although its effect is greater along the axis it is applied. We can take the example of snooker. Note that stability is necessary for this action reaction process.

4. These facts tell us action and reaction are not equal in magnitude along the same axis through which the force is applied but are proportional. In other words, we can say that the two sentences "action and reaction are equal in magnitude" and " opposite in direction" if used collectively are wrong.

Answer 2

Newton's third law of motion ("For every action, there is an equal and opposite reaction") is a fundamental principle that accurately describes the relationship between forces. However, in some circumstances involving very high speeds or interactions at the quantum level, the application of the third law may become more complex. Overall, it is a highly successful and reliable law of physics.