My modification to newtons third law, do you agree?

Question

Newton's Third law states that : "Every action has a equal and a opposite reaction."

I have just modified it by adding one word stating : "Every action has a equal , opposite and a irreversible reaction."

"Irreversible" here just means that when there is any action which is considered as an example for newtons third law, the action cannot be reversed with respect to time.

Do you think this is valid? Do you cerebrate this statement?

Answer 1

Sorry, I disagree. Your modification adds the concept of entropy, but that doesn't make it better. One of the nice things about the original is that it works both forward and backward in time. Given the result of the interaction, you can determine the conditions that preceded it.

Also, the original is expressable mathematically, but yours is not.

Answer 2

No. Both classical mechanics and quantum mechanics are symmetric with time as one of the answerers has said that you are unnecessarily bringing entropy into the discussion which has to be brought when there are large number of particles and there is an element of uncertainty.

But almost all the answerer so far are perhaps thinking that the action and reaction - the Newton's third law talks about are one after another like cause and effect but it is not so. Both are simultaneous. None of them can be thought of as only cause and only effect.

In my answer I am giving a novel definition of force for comments from all:

Force is what Newton's Laws tell you about it nothing more and nothing less. I shall explain the meaning of nothing less and nothing more to one who is inquisitive enough!

Answer 3

I disagree with your statement because its not true. Not all actions correspond to irreversible reactions. Reversible and irreversible have very definite thermodynamic meanings. Although some processes are irreversible, not all processes are. Besides, Newton's third law doesn't always apply anyway...think relativity...

Answer 4

You can't really add a word to Newton's third law.

but i do believe that for every action that has been done the same action should be done back to you, if i chop of someones fingers... i should definitely get my fingers chopped off! maybe it would stop the crime around the world. to stop crime you have to promote some sort of action, which can also be a crime!

I don't think the word irreversible would make sense to that law. i believe the statement of adding such a word is irrelevant and should stay the same.

Answer 5

Good theory. Whenever a force is applied to anobject it always creaters another force called a reactionary force, that works in the opposite direction.
A canoneist paddling through water moves forward by such acion and reaction. The canoeist's paddle pushing the water backwards is the action. While the reaction is the force appliied by the water on the paddle , which pushes the canoe forward through the water. I don't think that time is a factor that effects motion of an object. But I have to think twice about your conclusion.
By the way it's a precious quesion for the future.