Newton's 3rd Law

Action and Reaction Forces

For every action, there is a reaction.

A force is a push or a pull that acts upon an object as a results of its interaction with another object.

Real world example: In this picture to the right, the two people on ice skates are pushing on each other. Since there is ice beneath them, when they push off of each other, they will depart.

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Newton's Law says...

This law is saying that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
Newton's 3rd Law of Motion