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{{quotation|'''KEY FORCE CONCEPT (ACTION-REACTION)''': Just because two forces are equal in magnitude and opposite in direction does ''not'' imply that they form an action-reaction pair in the sense of [[Newton's third law of motion]]. An action-reaction pair is a pair occurs between two bodies that exert forces ''on each other'', ''not'' for a pair of forces both acting ''on the same body''.{{{1}}}}}