Newton's Third Law
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Key Stage 4
Meaning
Newton's Third Law states that "For every action force there is a reaction force with an equal magnitude but acting in the opposite direction.
About Newton's Third Law
- The two forces referred to in Newton's Third Law are on separate objects which are interacting.
- When an object "A" exerts a force (action force) on object "B" then object "B" will exert a force (reaction force) on object "A". These two forces will be equal in magnitude and opposite in direction.
- The terms "action force" and "reaction force" may be misleading 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?