newtons third law

• What does Newtons third law state?


  for every action (force) in nature there is an equal and opposite reaction
• Equilibrium situation


  when the forces acting on it are all balanced, so there is no overall force acting on the body
• Identify action-reaction pairs and balanced forces


  consider the interaction between a baseball bat and a baseball. The baseball forces the bat to the left; the bat forces the ball to the right. Together, these two forces exerted upon two different objects form the action-reaction force pair.
• Distinguish between action-reactions pairs and balanced forces


  Balanced forces are equal and opposite forces that act on the same object. That's why they cancel out. Action-reaction forces are equal and opposite forces that act on different objects, so they don't cancel out. In fact, they often result in motion.
• Describe how objects affect each other when they collide

  When objects collide, they will exert equal and opposite forces on each other all the time they are in contact.