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Unit 5: Physics in Action

Unit 5: Physics in Action. Essential Questions. What is inertia, acceleration, and gravity? What are Newton’s 3 Laws of Motion and how can they be applied to everyday principles? How does a person’s center of mass effect their balance and performance?

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Unit 5: Physics in Action

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  1. Unit 5: Physics in Action

  2. Essential Questions • What is inertia, acceleration, and gravity? • What are Newton’s 3 Laws of Motion and how can they be applied to everyday principles? • How does a person’s center of mass effect their balance and performance? • What is vertical accelerated motion and how can this be applied to athletic jumping? • How does the surface effect the force due to friction, and how does this affect an athlete’s performance? • What is momentum and how is it conserved?

  3. Chapter Challenge – Due January 30 • You will need to find a 2-3 minute sports clip (can be recorded from TV or downloaded from the internet) of a sport that you enjoy watching/participating in • You may work individually or with a group (max. 3 people) • You will explain the physics principles behind the sport clip by either: • Submitting a written script • Performing a live narrative • Dubbing onto the video soundtrack • Recording on file

  4. Day 1: A running Start • Learning Objectives: • Understand and apply Galileo’s Principle of Inertia • Understand and apply Newton’s First Law of Motion • Recognize inertial mass as a physical property of matter

  5. Starter • Watch the following videos and answer the questions: • What determines the amount of horizontal distance a basketball player travels while “hanging” to do a slam dunk during a fast break? • How do figure skaters keep moving across the ice at a high speed for long periods of time while seldom pumping their skates? • Time: 15 minutes

  6. Activity 1 • Newton’s First Law of Motion • Place some water in a plastic beaker. • Place a piece of paper under the beaker. • Try to remove the paper without spilling any water • Try this again using a different amount of water. Any change? • Create a definition for Newton’s first law of motion based on what you observed • Time: 20 minutes

  7. Activity 2 • Make a target on a piece of paper • You are going to try to hit the target with a tennis ball as you run past it • Make any changes to your definition for Newton’s first law of motion based on what you observed • Time: 20 minutes

  8. Activity 3 • Complete steps 1-4 on pages 5 & 6 • Record your data in a table you create • Time: 25 minutes

  9. Closing & homework • What does Newton’s First Law of Motion state? • Why is a ball’s return height not a mirror image when you roll it down a ramp? • For you to read/Physics talk, page 8-12 • Physics to go, pg. 13 # 1, 4, 5, 6, 8, 9

  10. Day 2: Adding vectors • Learning Objectives: • Recognize that a force is a push or pull • Identify the forces acting on an object • Determine when the forces on an object are either balanced or unbalanced • Calibrate a force meter in arbitrary units • Use a force meter to apply measured amounts of force to objects • Compare amounts of acceleration semi-quantitatively • Understand and apply Newton’s Second Law of Motion • Understand and apply the definition of the newton as a unit of force • Understand weight as a spatial application of Newton’s Second Law

  11. Starter • What is a force? • What is Newton’s Second Law of Motion? • If you apply the same amount of force to the shot put and the tennis ball, • Will they move the same distance? • Will one ball move farther than the other? • Why? • Time: 15 minutes

  12. Activity 1 • Choose 4 various masses and record their weight in newtons. Check that the mass is correct by taking the mass on the electronic scale. • How will acceleration be calculated? • What do you notice about the acceleration of each mass? What does this number represent? • Time: 25 minutes

  13. Activity 2 F = ma a = F/m • Take a coffee mug and find its mass • Slide the coffee mug across the table at a slow, constant speed. Record the force used to pull the mug. • Repeat, this time sliding the mug at a faster rate. Record the force used to pull the mug. • Calculate the acceleration in both cases. What conclusion can you make? • Time: 15 minutes

  14. Activity 3 • We will go to the computer lab to go through 2 activities: • http://www.bbc.co.uk/bitesize/ks3/science/energy_electricity_forces/ • Go to “Forces” and do the “revise”, “activity”, and “test” • http://learner3.learner.org/interactives/parkphysics/bumpercars/ • Work through the bumper car problems • Time: 30 minutes

  15. Closing & homework • Read physics talk/for you to read, Pg. 18-22 • Physics to go, Pg 23. #1, 2, 5, 9 • Choose any 3 calculation questions from #3, 4, 11-18

  16. Day 3: Center of Mass • Learning Objectives: • Locate the centre of mass of oddly shaped 2-D objects • Infer the location of the cenre of mass of symmetrical 3-D objects • Measure the approximate location of the centre of mass of body • Understand that the entire mass of an object may be thought of as being located at the object’s centre of mass

  17. Starter • Watch the video of the world high jump record being set (2.45m) by Javier Sotomayor. Sotomayor is 1.95m tall. • Think of the following questions after you watch: • What is center of mass? What does this mean? • Where is your body’s center of mass? • The high jump technique to get over the bar is called the Fosbury Flop. Where is the person’s center of mass when they are trying to get over the high jump bar? • Time: 15 minutes

  18. Activity 1 • Cut out the shapes from the templates onto construction paper • Draw the shapes in your notebook as well • For shapes A, B, and C, try to locate the object’s center of mass • Where will the object balance on your finger? • Mark the balance points on your sketch in your notebook and on your object • Time: 30 minutes

  19. Activity 2 • You will now test to see if your balance point was accurate • Follow steps 3-7 on pp. 28-29 • Record the answers to the questions in your notebook as you go along • Time: 40 minutes

  20. Activity 3 • Watch the following videos to determine the athlete’s center of mass • How do you make a football player fall? • What do you notice about the gymnast’s center of mass? • Time: 10 minutes

  21. Closing & Homework • Physics to Go, pg. 30, #1, 2, 3, 5

  22. Day 4: Defy Gravity

  23. Day 5: Run and Jump

  24. Day 6: The Mu of the Shoe

  25. Day 7: Concentrating on Collisions (60 mins)

  26. Day 8: Summative Assessment • Presentation of Commentary on Sporting Event

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