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Daily Agenda

Daily Agenda. Ms. DeSalvo November 7, 2013. CPS Bell Ringer 11/7/13 Activity: A slinky, a slinky…. Can you name a tool that is used for measuring force?. CPS (Period 6,8) November 7, 2013. Period 6: 10:31 - 11:03 Period 8: 11:47 - 12:20. Last Class (See me for missed work) Forces Notes

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Daily Agenda

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  1. Daily Agenda Ms. DeSalvo November 7, 2013

  2. CPS Bell Ringer 11/7/13Activity: A slinky, a slinky… • Can you name a tool that is used for measuring force?

  3. CPS (Period 6,8)November 7, 2013 Period 6: 10:31 - 11:03Period 8: 11:47 - 12:20 Last Class (See me for missed work) • Forces • Notes • Inertia Stations • Homework 2.1 Newton’s 1st Law of Motion Today • Measuring Force • Newton’s 3rd Law • Intro to Spring Scales • Spring scale demos

  4. CPS Bell Ringer 11/7/13 No Bell Ringer Today!

  5. What is a Force? • A push or a pull

  6. How do we measure a force? • Spring Scale • Measured in Newtons (N) • Pull to: • 1 N • 4 N • 6 N • 8N • 10 N

  7. Link 2 Spring Scales Together and Read the spring scale • Link to a stationary object (your desk) and pull • Both partners pull to 3 N • One partner pull, one partner hold • Link together, both partners pull and walk at a constant speed • Link together, both partners pull and accelerate your walk Conclusion: Force is the same when two objects interact on one another

  8. Force • Q: Can there be a force only on the puck and not on the string? • No, always need two objects • Between two objects • A push or a pull • that causes an acceleration or a change

  9. Newton’s 3rd Law of Motion Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first. For every action there is an equal and opposite reaction Action-reaction Force Pairs

  10. Action-Reaction • Forces come in pairs • Action: If you push on a table with 10 N • Reaction: the table pushes back on you with 10 N • In the opposite direction

  11. Example #1 • Action: A baseball pushes a glove to the left with 8 N. • What is the reaction force? • Reaction: A glove pushes a baseball to the right with 8 N.

  12. Example: Newton’s 3rd Law Ex: Bird uses its wings to fly. Action: Wings push air downwards with 10 N Reaction: Air pushes the bird upwards with 10 N Equal Force in opposite directions

  13. Example: Newton’s 3rd Law Ex: Interaction between a baseball and bat Action: Baseball forces the bat to the left at 12 N Reaction: The bat forces the ball to the right 12 N Action-reaction Force Pairs

  14. Example: Newton’s 3rd Law Ex: Interaction between tires on car and road Equal Force in opposite directions Action-reaction Force Pairs For every action there is: an equal (in size) & opposite (in direction) reaction

  15. Example: Newton’s 3rd Law Ex: Interaction between ball and Earth Action: Earth pulls down on ball Reaction: Ball pulls up on Earth Equal Force in opposite directions

  16. BIO Bell Ringer 11/7/13Activity: What is energy? • What is the scientific definition of energy? • What is an ecosystem?

  17. Biology (Period 2,3,4)November , 2013 Period 2: 7:59 - 8:31Period 3: 8:37 - 9:09Period 4: 9:15 - 9:47 Last Class (See me for missed work) • Test Today! • Please be seated. • Get out your study guide. • Get out a pen or pencil and wait quietly for directions. Today • Ipads – Ecological Foot Print Quiz • Do not change any setting on the ipad, do not use it for anything except what you are directed to do.

  18. Ecological Foot Print Quiz • Turn the Ipad on • Go to settings • Click WIFI • Choose “308.1x” • When prompted, enter your student username and password. (The one you would use to log on to a school computer.) • Once you are on the network, go to Safari. • Search “Ecological Footprint” and go to the quiz. • Begin the quiz, answer the questions the best you can. Make approximations where you are unsure. When you are done, write down the quiz results. I will collect it for a grade!!!

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