Newton's Third Law: Action and Reaction

Year 9 Science Understanding Forces in Motion New Zealand Curriculum

WALT (We Are Learning To)

Understand Newton's Third Law: For every action, there is an equal and opposite reaction Identify examples of Newton's Third Law in everyday contexts Apply the law to explain physical interactions Develop scientific reasoning skills

Newton's Third Law

For every action, there is an equal and opposite reaction

Feel the Force Activity

Partner up with a classmate Place your palms together and push gently Feel the force pushing back on your hands Discuss: What forces are acting? Are they equal?

Action-Reaction Pairs in Everyday Life

{"left":"Walking: Your foot pushes back on the ground\nThe ground pushes forward on your foot\nSwimming: You push water backwards","right":"Water pushes you forwards\nJumping: You push down on the ground\nThe ground pushes up on you"}

Forces in Action: Rocket Launch

Think and Discuss

A person jumps off a small boat onto a dock What happens to the boat? Which forces are acting? Why does this happen?

Success Criteria - Can You?

State Newton's Third Law in your own words Give clear examples from everyday life showing action-reaction pairs Describe how forces act in pairs during physical interactions Design a simple experiment to demonstrate the law