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Question of the DAY DEC 11

Which step of EDP evaluates the pros and cons of different ideas? A. STEP 3 B. STEP 4 C. STEP 5 D. STEP 6. Question of the DAY DEC 11. Discuss the quantities of velocity involved in the throwing of a projectile (THINK Vectors!!!). Explain your answer using mathematic principles.

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Question of the DAY DEC 11

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  1. Which step of EDP evaluates the pros and cons of different ideas? • A. STEP 3 • B. STEP 4 • C. STEP 5 • D. STEP 6 Question of the DAY DEC 11

  2. Discuss the quantities of velocity involved in the throwing of a projectile (THINK Vectors!!!). • Explain your answer using mathematic principles. DO NOW DEC 11

  3. Both Vx and Vy are equally important. • Equal horizontal and vertical velocities will provide the projectile with the maximum distance in travel. • If Vx is greater than Vy, the projectile’s trajectory will push it downward into the ground. • If Vy is greater than Vx, the projectile’s trajectory will push it upward causing it to lose energy and shorten the distance it travels. • How do you achieve equal horizontal and vertical velocities? DO NOW ANSWERED DEC 11

  4. BIG QUESTION: How does EDP affect the design and construction of a solution to a proposed problem? • 1. Question of the Day and DO NOW • 2. Newspaper Tables Challenge II • Once you finish your 2nd Design, work on rolling the newspaper and shaping the supports into a square/triangle shape and RETEST. • 3. Introduce Catapult Challenge Project • 4. Review and Homework AGENDA DEC 11

  5. Torsion can be defined as a • A. Rotational Force • B. Twisting force • C. Linear Force • D. Pulling force Question of the DAY DEC 12

  6. What is the acceleration of an object due to gravity in SI units? • Discuss the effects gravity has on the workings of a catapult or trebuchet. DO NOW DEC 12

  7. 9.8 meters/second squared • Gravity is the force exerted on all objects by the Earth that are on or near its surface. • Gravity will ultimately pull any object including a projectile launched by a siege engine to the ground. • It is also the simple force used to power the trebuchet. • The device believed to be the most effective siege weapon prior to the advent of gunpowder and the cannon. DO NOW ANSWERED DEC 12

  8. BIG QUESTION: How does EDP affect the design and construction of a solution to a proposed problem? • 1. Question of the Day and DO NOW • 2. Newspaper Tables II Results/Questions • 3. CATAPULT CHALLENGE PROJECT • 4. Medieval Siege Video • Complete Video Guide • 5. Review and Homework • Tomorrow: Meet in 417 • We will then go to the library. AGENDA DEC 12

  9. CATAPULT CHALLENGE STEM Trimester 2 2013

  10. You will work in your teams to complete this project. CATAPULT CHALLENGE TEAMS

  11. Watch the following video documenting the tedious and very demanding process of building a medieval trebuchet. How to build a catapult in eight easy steps

  12. http://www.youtube.com/watch?v=5WDiW1WDyrA MEDIEVAL SIEGE

  13. BIG QUESTION: How does EDP allow you to build a working solution to a proposed problem? • 1. LIBRARY Research Day • We are on the island • 2. Catapult Teams • 3. Objectives AGENDA DEC 13

  14. Begin some informal research on the CATAPULT CHALLENGE PROJECT • Write down websites and other useful links. • Make a team decision to build a CATAPULT or a TREBUCHET • Any research, brainstorming, discussion, ideas, sketches, websites, video clips, or anything else to do with this project must be recorded. • Elect a Note Taker (Remember the EDP!) • Use your notebook like a journal • Write EVERYTHING down • Required to earn maximum points for project TODAY’S OBJECTIVES DEC 13

  15. When constructing a trebuchet, which component design will be most critical to a successful throw? • A. Framework • B. Wheels • C. Throwing arm • D. Sling Question of the Day DEC 16

  16. Work with your Catapult teams. • BRAINSTORM for 10 minutes about websites and ideas you have found through your RESEARCH. • Ask yourselves which part of the project will be most challenging for you. • GET ORGANIZED!!! DO NOW DEC 16

  17. BIG QUESTION: How does EDP affect the design and construction of a solution to a proposed problem? • 1. Question of the Day and DO NOW • 2. CATAPULT CHALLENGE PROJECT Presentation • 3. Medieval Siege Video • Complete Video Guide • 4. Review and Homework AGENDA DEC 16

  18. http://www.youtube.com/watch?v=5WDiW1WDyrA MEDIEVAL SIEGE

  19. A block and tackle utilizing a double pulley reduces the amount of force required to lift objects. How much force is required to lift a automobile with a mass of 5400 kg? • A. 5400 N • B. 2700 N • C. 1350 N • D. 900 N Question of the DAY Dec 17

  20. Work with your Catapult Teams to design your presentation. • Lay out each section of your presentation and what you want to include in each one. • Include diagrams, video clips, images, and other useful information. • GET ORGANIZED!!! TEAMWORK!!! • We will be in the library on Friday. • Presentations are DUE on MONDAY DEC 23. • BE PREPARED TO PRESENT!!! DO NOW DEC 17

  21. ALL TEAMS MUST BE PREPARED TO PRESENT. • ANY TEAM NOT READY WILL LOSE 20% OF THEIR GRADE. • Refer to the grading rubric for a breakdown of scoring categories. PRESENTATIONS

  22. BIG QUESTION: How can energy be used to launch a projectile? • 1. Question of the DAY and DO NOW • 2. Hand in Medieval Siege Video Questions • 3. Catapult Physics – Forces • 4. Measurements and Scaling • 5. Catapult Teams – Presentations • DUE MONDAY DEC 23 AGENDA DEC 17

  23. You are asked to design a new touring bicycle for the US Postal Service team. • Describe how you would go about this process. Use EDP as a framework DO NOW Jan 2

  24. Find out if the riders have any specific requests (Step 1) • Determine a budget, building materials, and how quickly they need it (2). • Research existing models and share new ideas. Collect data on what works (3). • Choose a few ideas to develop. Different frame materials (aluminum, titanium, carbon fiber). Notes and drawings (4) DO NOW ANSWERED Jan 2

  25. List pros and cons of each bicycle design (5). • Pick the best idea with your team. Use multiple parts from different ideas (Frame material from one idea and frame geometry from another idea 6). • Build a bike. Does it all fit together? (7) • Get out and RIDE! Make improvements based upon rider feedback, input, suggestions (8) DO NOW Answered Jan 2

  26. Catapults use stored energy to hurl a projectile without the use of an explosive charge. The three primary energy storage mechanisms are tension, torsion, and gravity. (Real-World Physics) THE PHYSICS OF A CATAPULT

  27. Tension is the pulling force exerted by a string, cable, chain, or similar solid object on another object. • Tension is the opposite of compression force. • Measured in Newtons (N). • PE when drawn or taut (C) • Energy = 0 at rest (B) • KE when released (A) TENSION

  28. Bows and Crossbows • Composite bow is a traditional bow laminated together. • When the bow is drawn, the sinew (stretched on the outside) and horn • (compressed on the inside) store • more energy than wood for the • same length of bow. Examples of Tension

  29. Muscle Fibers create tension during a muscle contraction. • Muscle fibers slide across one another producing tension. Examples of Tension

  30. Torsion is the twisting of an object due to an applied torque. • Torque is a rotational force. • An object tends to rotate about a fixed object. Torque = Force x Lever Arm Distance TORSION

  31. Torque

  32. Flexible elastic object that stores mechanical energy when it is twisted. • Torsion bar suspensions Examples of Torsion

  33. Examples of Torsion

  34. A counterweight is an equivalent counterbalancing weight that balances a load. Counterweight

  35. Which of the following is not measured in Newtons? • A. Tension • B. Compression • C. Weight • D. Stress Question of the DAY DEC 18

  36. You have been asked to build a workbench for the Art Department. • List five factors you would consider when designing/assembling the table. • Briefly explain why each factor is important. • Cost of the table is not a factor. DO NOW DEC 18

  37. 1. Size of the table • 2. Type of material to build it with • Must meet the demands of the class environment • 3. Location of the table (Space limitations) • Indoor/Outdoor (will also affect the materials used) • 4. Uses of the table • Art work, painting, sculpting, pottery • 5. Dimensions of the table (Height, width, Length) • 6. Ease of maintenance and cleaning. • 7. Who will be using it? • Age of students DO NOW Answered DEC 18

  38. BIG QUESTION: How can energy be used to launch a projectile? • 1. Question of the DAY and DO NOW • 2. Catapult Physics – Forces • 3. Measurements and Scaling • 4. Review and Homework • 5. Catapult Teams – Presentations • DUE MONDAY DEC 23 AGENDA DEC 18

  39. When a counterweight is greatly overbalanced on one end of a lever, it can produce large amounts of energy. Potential Energy vs. Kinetic Energy Counterweight is not moving vs. moving. Counterweight

  40. Catapults work by storing energy in twisted ropes. • They function much like an archery bow. • The tension stored is released as kinetic energy. The Mangonel Catapult

  41. The trebuchet uses a counter-balance weight to rapidly rotate the throwing arm when the weight is released. The Trebuchet

  42. The twisted rope is commonly referred to as a torsion bundle. • It consists of several lengths of rope with the arm inserted in between them. • The rope is then twisted manually on both sides of the arm using levers. • Upon release, the torsion bundle rotates the arm at high speed, launching the payload. Generating Energy

  43. A wooden bridge has a width of 28 feet and a length of 120 feet. Accurate testing of the bridge’s efficiency requires you to build a scale model of it. If the scaled width of the bridge is 7 feet, what is the scaled length of the bridge? • A. 20 • B. 28 • C. 30 • D. 40 Question of the DAY Dec 19

  44. List the eight steps of the EDP. • Which step do you believe is the most important to the success of your Catapult Challenge? • Explain your answer. DO NOW DEC 19

  45. Big QUESTION: How do scale model drawings assist you in building a successful catapult/trebuchet? • 1. Continue Measurements and Scaling • 2. Project Presentations: DUE Monday DEC 23 • ALL TEAMS MUST BE PREPARED TO PRESENT. ANY TEAM NOT READY WILL LOSE 20% of THEIR GRADE. • Practice your presentations!!! • Share your presentation with each other. HOMEWORK: Measurements/Scaling Activity DUE Tomorrow Complete Designing a Garden: DUE MONDAY DEC 23 AGENDA DEC 20

  46. 1. All teams should finish their presentations first. • 2. I will check with every team in the Media Center to make sure you are on task. • 3. I am looking for completed presentations including diagrams, video clips, animations, as well as an order of presentation. Slides each team member will be presenting. Know your information. PRACTICE. Being unprepared will affect your grade. • 4. All team members must have a copy of the presentation. Being ABSENT is NOT an EXCUSE!!! • 5. Continue with your RESEARCH. BE ORGANIZED! Media Center Expectations for Sept 20

  47. BIG Question: What benefits do research provide to the completion of the Catapult Challenge? • 1. Catapult Challenge Progress Presentations • 2. All teams must be prepared to present. • 3. HOMEWORK • HAPPY HOLIDAYS!!! • MERRY CHRISTMAS and HAPPY NEW YEAR!!! AGENDA DEC 23

  48. You need to review two designs for a project you are working on. It is necessary to reevaluate the pros and cons of each design. • You would check your notes for which EDP step to do this… • A. Step 4 • B. Step 5 • C. Step 6 • D. Step 3 Question of the DAY Jan 2

  49. Underwater exploration is the new frontier for many kinds of research. • A new type of self-contained submersible is needed to expand current capabilities of exploration. • Apply the steps of EDP to the plan and design of a deep-sea vehicle. • What questions need to be asked throughout the process? DO NOW Jan 2

  50. Special requests/requirements (Step 1) • Determine a budget, building materials, and how quickly they need it (2). • Research existing models and share new ideas. Collect data on what works (3). • Choose a few ideas to develop. Include life support systems, power/fuel sources, and frame construction. DO NOW ANSWERED Jan 2

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