Newtons laws 215 lt_f12

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Newtons laws 215 lt_f12

  1. 1. GREENtreeChristopher Alston, Andre Bernal,Julian Quick, and Jesse ZipurskyEngineering 215 Fall 2012
  2. 2. To design and build a set ofapparatuses that demonstrateNewton’s three laws of motion toLaurel Tree high school students
  3. 3. 1st Law: An object stays inconstant motion unlessacted upon by an externalforce2nd Law: Force equals masstimes acceleration3rd Law: For every actionthere is an equal andopposite reaction
  4. 4. • Durability• Mysteriousness• Safety• Educational Value• Measurability• Accuracy & Precision• Inexpensive• Storability• Sustainability
  5. 5. Inclined Planes Loop de Loop Rollercoaster Balloon Rocket
  6. 6. Inclined Planes in construction The finished apparatus • Solving for the coefficient of friction for each surface • Demonstrates friction and inertia on a moving object • Different surfaces are secured on the planes with Velcro ®
  7. 7. Free Body DiagramInclined Planes • N = mgcos(θ) • Assume f =  N • mg sin(θ) = mgcos(θ) • = tan(θ) Friction cutouts
  8. 8. • Practical application• Students can calculate initial height needed to pass loop• Demonstrates F=ma, potential energy and centripetal acceleration Loop de Loop Rollercoaster Julian Quick, 2012
  9. 9. At top of loop, Fcentripetal acceleration ≥ Fgravity m ac ≥ m g ac ≥ g Marble Given that ac = v2 / r To get v2, Use conservation of energy: v2 = 2 g h So, 2 g h / r ≥ gJulian Quick, 2012 h≥r/2
  10. 10. • Demonstrates Newton’s Third Law• Calculate average velocity• Varying distances Balloon Rocket Apparatus
  11. 11. balloon Straw (unseen) TrackThe Rocket Balloon in use
  12. 12. Inclined Planes Loop de Loop Rollercoaster Balloon Rocket Retail Retail Retail Material Quantity Cost ($) Material Quantity Cost ($) Material Quantity Cost ($) Cost ($) Cost ($) Cost ($)Plywood 6" by Foam Pipe 1.25” PVC Pipe 2 donated $ 33.50 2 $ 3.98 $ 3.98 2 $ 5.49 $ 5.4930” (planes) Insulation at 4’Plywood 4 by 4 1.25 “PVC Pipe 6 gal Buckets 2 $ 13.98 $ 13.98 1 donated $ 16.37 6 3.56 $ 3.56(platform) segments 1.25” PVC 2 $ 2.98 $ 2.98Hinges 8 $ 17.98 $ 17.98 1’x .5’ Plywood 1 donated $ 5.37 CouplingMetal Slate 6" by Adhesive 1 $ 3.29 $ 3.29 Eye Hook 2 $ 3.98 $ 3.98 1 donated $ 21.9830” Bag of Marbles 6 $ 2.99 $ 2.99 1.25” PVC Plug 2 $ 2.99 $ 2.99Carpet 6" by 30” 1 donated $ 5.79 Total $ 13.82 $ 19.19 String or Thin 1 $ 8.99 $ 8.99Wooden Blocks Line at 7’ 4 donated $ 11.562" by 6" A Pack of 1 $ 2.97 $ 2.97Plywood Stand 2 donated $ 15.49 BalloonsNails and 1” tubing 1 $ 1.99 $ 1.99 1 $ 0.17 $ 0.17Hardware section at 1’Wood Glue 1 $ 3.49 $ 3.49 Washers 4 $ 0.80 $ 0.80Velcro® 8 $ 3.99 $ 3.99 Spray Painy 2 $ 9.98 $ 9.98 Total $ 27.45 $132.14 40LB Concrete 1 $ 5.49 $ 5.49 Total $ 57.82 $ 57.82 Cost Paid $ 99.09 Retail Cost $ 209.15
  13. 13. Total Hours: 200.25
  14. 14. Becca SchulerLaurel Tree Charter SchoolMarty ReedLewis CMichelle “Moss” WurlitzerArcata LumberLonny Grafman

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