What puts the thrill in a thrill ride?

1. What puts the thrill in a thrill ride? Elizabeth Buckholtz Toledo Public Schools

2. Show videos of Cedar Point roller coasters. Elizabeth Buckholtz Toledo Public Schools

3. What puts the thrill in a thrill ride? Elizabeth Buckholtz Toledo Public Schools

4. Kinetic Energy • The energy of motion is called kinetic energy. • I think of kinetic energy as the hurt factor. Elizabeth Buckholtz Toledo Public Schools

5. Kinetic Energy Elizabeth Buckholtz Toledo Public Schools

6. Kinetic Energy Elizabeth Buckholtz Toledo Public Schools

7. Kinetic Energy K.E. = mass x velocity2 2 Elizabeth Buckholtz Toledo Public Schools

8. Kinetic Energy K.E. = mass x velocity2 2 .2 kg m2/s2 .4 kg m2/s2 .2 Joules 20.25 m2/s2 20 grams .02 kg 4.5 m/s 10 mi/h Elizabeth Buckholtz Toledo Public Schools

9. Kinetic Energy K.E. = mass x velocity2 2 35.45 kg m2/s2 35.45 Joules 70.875 kg m2/s2 3.5 kg 4.5 m/s 20.25 m2/s2 Elizabeth Buckholtz Toledo Public Schools

10. Kinetic Energy • .2 Joules • 35.45 Joules Elizabeth Buckholtz Toledo Public Schools

11. Kinetic Energy • The greater the mass of a moving object, the more kinetic energy it has. Elizabeth Buckholtz Toledo Public Schools

12. Kinetic Energy Elizabeth Buckholtz Toledo Public Schools

13. Kinetic Energy Aroldis Chapman Elizabeth Buckholtz Toledo Public Schools

14. Kinetic Energy K.E. = mass x velocity2 2 30 Joules .15 kg 400 m2/s2 30 kg m2/s2 60 kg m2/s2 45 mi/h Elizabeth Buckholtz Toledo Public Schools

15. Kinetic Energy K.E. = mass x velocity2 2 2025 m2/s2 304 kg m2/s2 45 m/s 100 mi/h .15 kg 152 kg m2/s2 152 Joules Elizabeth Buckholtz Toledo Public Schools

16. Kinetic Energy • 30 Joules • 152 Joules Elizabeth Buckholtz Toledo Public Schools

17. Kinetic Energy • The faster an object moves, the more kinetic energy it has. • Kinetic energy depends on both mass and velocity. Elizabeth Buckholtz Toledo Public Schools

18. Kinetic Energy K.E. = mass x velocity2 2 Elizabeth Buckholtz Toledo Public Schools

19. Potential Energy • Potential Energy is stored energy. • Stored chemically in fuel, the nucleus of atom, and in foods. • Or stored because of the work done on it: • Stretching a rubber band. • Winding a watch. • Pulling back on a bow’s arrow. • Lifting a brick high in the air. Elizabeth Buckholtz Toledo Public Schools

20. Gravitational Potential Energy • Potential energy that is dependent on height is called gravitational potential energy. Elizabeth Buckholtz Toledo Public Schools

21. Gravitational Potential Energy • The formula to find G.P.E. is G.P.E. = Mass X Height x Gravity. 9.8m/s2 Elizabeth Buckholtz Toledo Public Schools

22. Gravitational Potential Energy a marble on your desk G.P.E. = Mass X Height X 9.8 m/s2 .02 kg 1 m .2 Joules Elizabeth Buckholtz Toledo Public Schools

23. Gravitational Potential Energy a marble on the Empire State Building G.P.E. = Mass X Height X 9.8 m/s2 .02 kg 443 m 87 Joules Elizabeth Buckholtz Toledo Public Schools

24. Gravitational Potential Energy • .2 Joules • 87 Joules Elizabeth Buckholtz Toledo Public Schools

25. Gravitational Potential Energy • The higher an object is, the more gravitational potential energy it has. Elizabeth Buckholtz Toledo Public Schools

26. Gravitational Potential Energy A bowling ball on the Empire State Building G.P.E. = Weight X Height X 9.8 m/s2 443 m 3.5 kg 15,000 Joules Elizabeth Buckholtz Toledo Public Schools

27. Gravitational Potential Energy • 87 Joules • 15,000 Joules Elizabeth Buckholtz Toledo Public Schools

28. Gravitational Potential Energy • The more an object weighs, the more gravitational potential energy it has. Elizabeth Buckholtz Toledo Public Schools

29. Gravitational Potential Energy • “The bigger they are the harder they fall” is not just a saying. It’s true. Objects with more mass have greater G.P.E. Elizabeth Buckholtz Toledo Public Schools

30. Energy Transformations • Most forms of energy can be transformed into other forms. • One of the most common transformations is between potential and kinetic energy. Elizabeth Buckholtz Toledo Public Schools

31. Energy transformations (falling objects) has a little KE maximum GPE maximum height GPE decreasing height decreasing KE increasing velocity increasing maximum KE maxium velocity Height 0 meters GPE 0 Joules Elizabeth Buckholtz Toledo Public Schools

32. Energy transformations (falling objects) • Where did all that KE come from? • As the water fell, PE was converted to KE. Elizabeth Buckholtz Toledo Public Schools

33. Energy Transformation(object thrown upward) maximum height maximum PE KE decreasing Velocity is decreasing no KE balanced force ball does not move PE increasing height increasing velocity increasing KE increasing very little height very little PE max velocity max KE Elizabeth Buckholtz Toledo Public Schools

34. Energy Transformation(object thrown upward) • As objects fall potential energy is transformed to kinetic energy. • An object has maximum potential energy at the top of it’s path. • As an object falls potential energy is transformed into kinetic energy. • A moving object has maximum kinetic energy at the lowest point of it’s path. Elizabeth Buckholtz Toledo Public Schools

35. Conservation of Energy • Energy can not be created or destroyed, it changes forms. Elizabeth Buckholtz Toledo Public Schools

36. Kinetic-Potential Energy Conversion Roller coasters work because of the energy that is built into the system. Initially, the cars are pulled mechanically up the tallest hill, giving them a great deal of potential energy. From that point, the conversion between potential and kinetic energy powers the cars throughout the entire ride. Elizabeth Buckholtz Toledo Public Schools

37. Show videos of student roller coasters Elizabeth Buckholtz Toledo Public Schools

38. Roller Coaster Challenge • You are going to be working in teams to build a roller coaster • 12 feet of pipe insulation • 1 marble • Tape • Requirements • Two hills • 1 trick (corkscrew, loop, twist, etc) Elizabeth Buckholtz Toledo Public Schools

39. Roller Coaster Challenge • Get into your groups. • Plan your roller coaster. • Draw a diagram. • Diagram must include • Name of roller coaster • Place of maximum gravitational potential energy • Place of GPE transforming into kinetic energy • Place of maximum KE (assuming ideal conditions) Elizabeth Buckholtz Toledo Public Schools

40. Example Diagram Elizabeth Buckholtz Toledo Public Schools

41. Roller Coaster Challenge • Present designs Elizabeth Buckholtz Toledo Public Schools

42. Build Roller Coasters • minimum three days • students keep a journal • At the end of every day they record • problems encountered & solutions • design changes and why • Observations Elizabeth Buckholtz Toledo Public Schools

43. Sample Journal Entry Elizabeth Buckholtz Toledo Public Schools

44. Roller Coaster Derby Day • Each group presents their roller coaster. • Tell the name • Tell the features, including measurements • Points out point of • Highest GPE • Highest KE • Place where GPE is transforming to KE • Answer questions • Run coaster • Videotape if possible. Elizabeth Buckholtz Toledo Public Schools

45. Sample Roller Coaster Elizabeth Buckholtz Toledo Public Schools

46. Roller Coaster Derby Day • Use graph paper to draw a scale diagram of their final roller coaster. • Label points of • Greatest GPE • Greatest KE • Transformations between GPE and KE Elizabeth Buckholtz Toledo Public Schools

47. Sample Graph Elizabeth Buckholtz Toledo Public Schools

48. Assessment • Use rubrics. • Original design • Journal • Team work and productivity (can be self and peer assessed) • Final roller coaster • Diagram Elizabeth Buckholtz Toledo Public Schools

49. Assessment • Class choice – which roller coaster they would most want to ride. • Longest drop • Highest hill • most tricks Elizabeth Buckholtz Toledo Public Schools

50. Other topics • Accelerations • Positive • Negative • Centripetal • Average speed • Distance • Displacement • Newton's laws of motion Elizabeth Buckholtz Toledo Public Schools