Reaction-Action-Activities relationship?
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From: dlzc on 17 Mar 2010 10:02 Dear Kumar: On Mar 16, 5:30 pm, Kumar <lordshiva5...(a)gmail.com> wrote: > On Mar 16, 7:39 pm,dlzc<dl...(a)cox.net> wrote: > > On Mar 16, 4:35 am, Kumar <lordshiva5...(a)gmail.com> wrote: > > > > Newton's third law is frequently stated > > > > "Action and reaction are equal and opposite > > > To every action there is an equal and opposite reaction" > > > ... > > > I have some questions:- > > > > 1. Is it also true that "to every reaction there is equal > > > and opposite action"? > > > This is just causality and / or a decision of "which > > came first". The third law is more a statement of > > conservation of momentum. > > > > 2. Can we consider action or reaction as activities > > > or motions and as law hold universal application, > > > whether above action reaction relationship will apply > > > to all our activities? > > > The neck you slit pushed back against your knife. > > Does that help you in some way? > > > Science in general serves to describe determinism, > > but Newton's third is not what you are seeking. > > I am trying to look its its general application It's general application is "conservation of momentum". > not simply limited to physics in view of that it is > considered as law. It is not law as in handed down by God, or writ of the People. It seems to describe the Universe around us, and we can find no exceptions to it. It says nothing about where you want to push it. I know you cannot comprehend the difference, but you are intelligent enough to make postings to usenet, so we will hear about this exact topic again in a few months. As we just did, again. David A. Smith
From: PD on 17 Mar 2010 10:33 On Mar 16, 6:35 am, Kumar <lordshiva5...(a)gmail.com> wrote: > Hello, > > Newton's third law is frequently stated > > "Action and reaction are equal and opposite > To every action there is an equal and opposite reaction" > > Law is defined as; > > The term law is often used to refer to universal principles that > describe the fundamental nature of something, to universal properties > and relationships between things, or to descriptions that purport to > explain these principles and relationships.http://en.wikipedia.org/wiki/Law_(principle) > > I have some questions:- > > 1. Is it also true that "to every reaction there is equal and opposite > action"? > > 2. Can we consider action or reaction as activities or motions and as > law hold universal application, whether above action reaction > relationship will apply to all our activities? > > Best wishes. The better way to say the third law is thus: Interactions between bodies are always pairwise, so that what A exerts on B, B exerts on A, in equal amount but in the opposite direction. "Exert" here is taken to mean either a force or a momentum transfer. It does NOT mean the response to that exertion, which is seen as motion of the body. As an example of this last distinction, consider the collision of a mosquito with the windshield of a speeding truck. The force the mosquito exerts on the truck is just as big as the force the truck exerts on the mosquito. The momentum transferred from the mosquito to the truck is just as big as the momentum transferred from the truck to the mosquito. But the change in motion of the mosquito (the response to the truck's interaction with it) is much larger than the change of motion of the truck. PD
From: Igor on 17 Mar 2010 14:33 On Mar 16, 8:26 pm, Kumar <lordshiva5...(a)gmail.com> wrote: > On Mar 16, 9:34 pm, Igor <thoov...(a)excite.com> wrote: > > > > > > > On Mar 16, 7:35 am, Kumar <lordshiva5...(a)gmail.com> wrote: > > > > Hello, > > > > Newton's third law is frequently stated > > > > "Action and reaction are equal and opposite > > > To every action there is an equal and opposite reaction" > > > > Law is defined as; > > > > The term law is often used to refer to universal principles that > > > describe the fundamental nature of something, to universal properties > > > and relationships between things, or to descriptions that purport to > > > explain these principles and relationships.http://en.wikipedia.org/wiki/Law_(principle) > > > > I have some questions:- > > > > 1. Is it also true that "to every reaction there is equal and opposite > > > action"? > > > > 2. Can we consider action or reaction as activities or motions and as > > > law hold universal application, whether above action reaction > > > relationship will apply to all our activities? > > > > Best wishes. > > > It applies to forces. Almost nothing else.- Hide quoted text - > > > - Show quoted text - > > Thanks. Are activities not actions & reactions? I think there is a > link between forces with actions, reactions and so with activities. Newton was talking strictly about forces. I have no idea what you are talking about.
From: Kumar on 17 Mar 2010 23:07 On Mar 17, 7:33 pm, PD <thedraperfam...(a)gmail.com> wrote: > On Mar 16, 6:35 am, Kumar <lordshiva5...(a)gmail.com> wrote: > > > > > > > Hello, > > > Newton's third law is frequently stated > > > "Action and reaction are equal and opposite > > To every action there is an equal and opposite reaction" > > > Law is defined as; > > > The term law is often used to refer to universal principles that > > describe the fundamental nature of something, to universal properties > > and relationships between things, or to descriptions that purport to > > explain these principles and relationships.http://en.wikipedia.org/wiki/Law_(principle) > > > I have some questions:- > > > 1. Is it also true that "to every reaction there is equal and opposite > > action"? > > > 2. Can we consider action or reaction as activities or motions and as > > law hold universal application, whether above action reaction > > relationship will apply to all our activities? > > > Best wishes. > > The better way to say the third law is thus: > Interactions between bodies are always pairwise, so that what A exerts > on B, B exerts on A, in equal amount but in the opposite direction. > > "Exert" here is taken to mean either a force or a momentum transfer. > It does NOT mean the response to that exertion, which is seen as > motion of the body. > > As an example of this last distinction, consider the collision of a > mosquito with the windshield of a speeding truck. The force the > mosquito exerts on the truck is just as big as the force the truck > exerts on the mosquito. The momentum transferred from the mosquito to > the truck is just as big as the momentum transferred from the truck to > the mosquito. But the change in motion of the mosquito (the response > to the truck's interaction with it) is much larger than the change of > motion of the truck. > > PD- Hide quoted text - > > - Show quoted text - Thanks. Is it based just on mass of subsance-one getting more or less momentum?
From: Kumar on 18 Mar 2010 00:21
On Mar 17, 11:33 pm, Igor <thoov...(a)excite.com> wrote: > On Mar 16, 8:26 pm, Kumar <lordshiva5...(a)gmail.com> wrote: > > > > > > > On Mar 16, 9:34 pm, Igor <thoov...(a)excite.com> wrote: > > > > On Mar 16, 7:35 am, Kumar <lordshiva5...(a)gmail.com> wrote: > > > > > Hello, > > > > > Newton's third law is frequently stated > > > > > "Action and reaction are equal and opposite > > > > To every action there is an equal and opposite reaction" > > > > > Law is defined as; > > > > > The term law is often used to refer to universal principles that > > > > describe the fundamental nature of something, to universal properties > > > > and relationships between things, or to descriptions that purport to > > > > explain these principles and relationships.http://en.wikipedia.org/wiki/Law_(principle) > > > > > I have some questions:- > > > > > 1. Is it also true that "to every reaction there is equal and opposite > > > > action"? > > > > > 2. Can we consider action or reaction as activities or motions and as > > > > law hold universal application, whether above action reaction > > > > relationship will apply to all our activities? > > > > > Best wishes. > > > > It applies to forces. Almost nothing else.- Hide quoted text - > > > > - Show quoted text - > > > Thanks. Are activities not actions & reactions? I think there is a > > link between forces with actions, reactions and so with activities. > > Newton was talking strictly about forces. I have no idea what you are > talking about.- Hide quoted text - > > - Show quoted text - Are activities not dependant on applied forces? |