Changes

'''Newton's Third Law''' states that "For every [[Action Force|action force]] there is a whenever two objects interact, the [[Reaction Force|reaction force]] with an s they exert on each other are equal in [[magnitude]] but acting and opposite in the opposite direction".

: The two [[force]]s referred to in '''Newton's Third Law''' are on the separate [[object]]s which are interacting.: When an [[object]] "A" exerts a [[force]] ([[Action Force|action force]]) on [[object]] "B" then [[object]] "B" will exert also be exerting a [[force]] ([[Reaction Force|reaction force]]) on [[object]] "A". These two [[force]]s will be equal in [[magnitude]] and opposite in direction.: The terms [[Action Force|"action force"]] and [[Reaction Force|"reaction force"]] may be misleading are sometimes misleadingly used in this context as they simply refer to which [[object]] the observer was interested in first, eg Did the ball hit the head or did the head hit the ball?However, the [[force]]s in such a [[Force Pair|force pair]] do not cause each other, they both exist simultaneously.: Newton's Third Law is related to the law of [[Conservation of Momentum]]. ===Examples===: The [[gravity|gravitational]] pull of the [[Earth]] on [[The Moon]] is equal in magnitude to the [[gravity|gravitational]] pull of [[The Moon]] on the [[Earth]].: The [[gravity|gravitational]] pull of the [[Earth]] on you is equal in magnitude to the [[gravity|gravitational]] pull of you on the [[Earth]]. That is to say that the [[Earth]] is equally pulled towards you as you are to the [[Earth]].: The [[Normal Contact Force|normal contact force]] of a book on a table is equal to the [[Normal Contact Force|normal contact force]] of the table on the book. Both objects exert the same force on one another.: When a rocket expells gas from its engine the [[force]] of the [[gas]] on the rocket is equal to the [[force]] of the rocket on the [[gas]].