Who coined the phrase 'for every action, there is an equal and opposite reaction'?

Question

Who said this phrase? Was it Sir Isaac Newton?

And wasn't this also some law in physics as well?

Answer 1

It is Sir Isaac Newton's Third law of motion

First law
Objects in motion tend to stay in motion, and objects at rest tend to stay at rest unless an outside force acts upon them.

Second law
The rate of change of the momentum of a body is directly proportional to the net force acting on it, and the direction of the change in momentum takes place in the direction of the net force.

Third law
To every action (force applied) there is an equal but opposite reaction (equal force applied in the opposite direction).

Answer 2

Yes, it is Newton's Third Law of Motion, also called the Law of Reciprocal Actions.

Answer 3

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That seems to me to be illogical logic. Every physical action has an equal and opposite reaction, thay occurs there and then. It's all done for. How can you possibly relate that to prediction of the future, beyond predicting what the physical reaction to an action might be?

Answer 4

This was Sir Isaac Newton. This was the third law of motion.

Newton's Laws of Motion are laws which provide relationships between the forces acting on a body and the motion of the body, first formulated by Isaac Newton.


Newton's First and Second laws, in Latin, from the original 1687 edition of the Principia Mathematica.Sir Isaac Newton's laws of motion were first published in his work Philosophiae Naturalis Principia Mathematica (1687). The laws form the basis for classical mechanics. Newton used them to explain many results concerning the motion of physical objects. In the third volume of the text, he showed that the laws of motion, combined with his law of universal gravitation, explained Kepler's laws of planetary motion.

http://en.wikipedia.org/wiki/Newton%27s_Third_Law_of_Motion
Check out this wikipedia site, too!

First law
Objects in motion tend to stay in motion, and objects at rest tend to stay at rest unless an outside force acts upon them.

Second law
The rate of change of the momentum of a body is directly proportional to the net force acting on it, and the direction of the change in momentum takes place in the direction of the net force.

Third law
To every action (force applied) there is an equal but opposite reaction (equal force applied in the opposite direction).

It is important to note that these three laws together with his law of gravitation provide a satisfactory basis for the explanation of motion of everyday macroscopic objects under everyday conditions. However, when applied to extremely high speeds or extremely small objects, Newton's laws break down; this was remedied by Albert Einstein's Special Theory of Relativity for high speeds and by quantum mechanics for small objects.

http://en.wikipedia.org/wiki/Newton's_laws_of_motion

The first two scentences were of my own creation though, I hope that I helped!

Answer 5

Its not a phrase. It IS a law of physics. I'm pretty sure it was Newton.

Answer 6

One assumes that you are paraphrasing the 3rd motion law postulated by Newton. However, the law only applies to physical science and should not be considered a truism when dealing with human reaction or behavior.

Answer 7

Its one of sir Isaac newton's laws of physics.

he came to this conclusion and others from the apple that struck him on the head.

It always amused me because if he got pissed with the apple and threw it high into the air it would come back to hit him again.

Answer 8

Newton's third law of physics.

Answer 9

Albert Einstein? Wait, i did a web search! You mean everything on the web isn't true?

Answer 10

it was most certainly newton..and yes it is both,a cliche and a law of physics...newtons third law of motion...

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