Newton's Third Law of Motion
Newton's third law deals with the relation between forces:
NEWTON'S THIRD LAW: A body subjected to a force rean equal counterforce to the applied force; a.ction and reaction are equal and oppositely directed.
Two forces are involved here: action and reaction. One force never acts alone. We can see equal and opposite reactive forces every day. A bird taking off from an overhead power line produces a reaction that moves the line backward; water forced out of a lawn sprinkler produces a backward reaction that rotates the sprinkler. The next section is for astronomy a classic example of action and reaction .
