Newton’s Third Law of Motion states that for every action, there is an equal and opposite reaction. For example, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. When you sit on a chair, your body puts a downward force on the chair and the chair puts an upward force on your body. The two forces that result from this are a force on the chair and a force on your body.
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The action force is the buck pushing downwards on the table and the reaction force is the table pushing upward on the book. | ||||||
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The action force is the horce pulling the cart forward and the reaction force is the cart pulling the horse backward. Even though the forces are equal, the horse and cart can still move because the horse exerts a greater force then the wagon pulling him back.
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| Newton's 3rd Law states that forces always occur in pairs called action and reaction forces. This means that if object "A" exerts a force on object "B", object "B" exerts an equal in magnitude but opposite in direction force on object "A". |  The action force is the weight pushing downward on the floor and the reaction force is the floor pushing upward on the weight. |
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The action force is the boy pushing forward against the wall, and the reaction force is the wall pushing backwards against the boy.
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