Lesson 157 Learning Goal: (You should be able to…) (3 weeks) Demonstrate and explain how Newton’s 3 laws apply to a balloon powered jet racer Solve a problem by designing and building a BPJR Success Criteria: (Can you …) Make a hot wheels car move using a balloon as it’s ‘force source’!

Organize lesson 157 LNB record

Essential Questions How are the relationships between certain variables related to motion. How is motion affected by gravity and other forces? How can the motion of an object be predicted from certain data about various variables?

Write to Think 157 (In your lab note book?) What causes the rocket to launch? What can you say about the direction that the rocket moves and the force that causes the rocket to launch upward? How could a balloon cause a Hot wheels car to move? How would you position the balloon to get the car to move forward? Draw a quick sketch!

Purpose of today: Make a hot wheels car move using a balloon as it’s ‘force source’! Does the size of the nozzle make a difference? Does adding extra mass make a difference? How could you design your BPJR so it will work! (5m, fast, wooden block)

Safety Tips and Instructions Safety and noise …. MUST be able to hear EVERYONE! Respect … materials, room, each other, self! BACKPACKS and BINDERS. LNB and pencil Do NOT purposefully burst balloons, OR make silly noise. PLEASE! Cars MAY ONLY move from the rear to the front of the lab. (Not side to side or back to front). Drive on the right!!! Purpose … move the hot wheels car (fast, straight, far, consistent) using balloon. (Why?) About 20 min to to experiment with the hot wheels, balloon and nozzles Teams will be assessed for PSR SKILLS … see rubric Teams will be assessed for LNB recording Leave lab as TIDY and ORGANIZED as it was when you came in. Please DO NOT take balloons, materials, out of the lab

Clear up Un do any ’construction’. Used tape in trash ALL nozzles in the cleaning fluid on front bench … TWO different containers! Tray and bench neat and tidy. THEN … Add to your LNB … discuss with partner your findings. RECORD!! Use the handout under the white tray to help Pictures are very useful … if they are labelled!

Explain the findings! SIDE 1 Explanations should include the answers to following questions What makes the hot wheels car move? In which direction is the hot wheels car moving? In which direction is the air that rushes out of the balloon moving? Which of Newton’s Laws is this? How does this help explain how the car moves? What are some variables that could be manipulated to improve the hot wheels car’s speed or acceleration? How did you experiment with the nozzle, letting the air out from the balloon? What did you find out? Why do you think so? What have you thought about the mass of your BPJR? What have you thought about drag or air resistance? What have you thought about good old friction!

Designing your own BPJR SIDE 2 Brainstorm with your team and decide what your team is planning to build FIRST. Set up and record in your LNB .. Labelled pictures! Use the green information sheet to check the ‘rules’ and ‘requirements’! Draw pictures/diagrams of the BPJR your team is planning to build. Plan to use your building/experimenting time wisely!.... Use the schedule for the remaining 4 weeks. What will your team try to do and when? What else does your team need? Who’s responsible for what? How will you remember?

End of lesson

Prizes For each class: Fastest (average of 3) car over 5m with wooden block Best decoration and style Best team name and car name Best teamwork, leadership and self direction

Newton’s 3rd video clip http://www.youtube.com/watch?v=cP0Bb3WXJ_k

Action - Reaction The forces exerted by two objects on each other are often called an action-reaction force pair. Either force can be considered the action force or the reaction force. Action and reaction force pairs don’t cancel because they act on different objects.

Newton’s Third Law Newton’s Third Law of Motion states: for every action force, there is an equal but opposite reaction force. This means that when you push on a wall, the wall pushes back on you with a force equal in strength to the force you exerted.

Demonstration and examples Balloon demonstration. Push a pencil point into your hand … what do you notice? (AF and RF?) Push your hand against the corner of the lab bench … what do you notice? How do you swim? What are the action-reaction force pairs for a girl kicking a soccer ball?

Newton’s 3rd … Explain some examples Swimming Letting a balloon go A jet aircraft flying A rocket taking off A dropped apple hitting the ground Trying to walk on ice Walking on a footpath A car moving Hitting a wall Lying on a mattress

Read to explain Newton’s 3rd law Read pages 55 to 57 OR handout on bench Use your reading strategies! BEFORE YOU READ CLOSELY for an explanation: Skim Make sub titles into questions DURING READING CLOSELY for an explanation: Pictures in your head Re read AFTER YOU’VE READ CLOSELY for an explanation: Write a summary … what are the really important parts … in your own words. Answer your questions

Set up the lab notebook- Assessment In your Lab note book!!! Neat. Some someone else can read and understand your processes Reasons for materials, design etc using Newton’s 3 Laws etc. Daily reflection of at least 5 sentences plus … Diagrams, drawings, pictures Record progress/work Record questions and problems. Why don’t we … The acceleration … How could we … The mass … Shouldn’t we … The air resistance/drag … Experimentation … what did you change (variables) and why? Data Conclusions

Storage of ‘stuff’ Make sure it’s in boxes: Spare ones on the side of the lab … help yourself. Make sure the box has your name on it: Markers and labels at the back of the lab Make sure it’s in the right location: Signs on the cupboards over the back bench to show you where. Keep it neat and tidy please! Thank you!