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Tuesday, March 23 rd Agenda PowerPoint Presentation
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Tuesday, March 23 rd Agenda

Tuesday, March 23 rd Agenda

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Tuesday, March 23 rd Agenda

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  1. Tuesday, March 23rdAgenda • Finish lab calculations • Chapter 8 Jeopardy Review • Homework: • Finish Chapter 8 Study Guide • Chapter 8 crossword Puzzle • Chapter 8 Test/Study Guide Due • Thursday, March 24th!

  2. Lab Calculations • To convert grams to kilograms: • Divide your number of grams by 1,000 • To convert centimeters to meters: • a. Divide your number of centimeters by 100

  3. Lab Calculations • 3. To find the average time ball traveled (s): • Time ball traveled for trial #1 • Time ball traveled for trial #2 • + Time ball traveled for trial #3 • Answer • b. Divide Answer by 3 to get average time (s)

  4. Lab Calculations • 4. To calculate the average speed of the ball (m/s): • Average speed = length of ramp (m) average time ball traveled (s) • To calculate final speed (m/s): a. Multiply average speed by 2 to get final speed

  5. Lab Calculations • To calculate final kinetic energy (J): • a. Use the equation for kinetic energy • KE = ½ X (mass of ball) X (final speed)2 • To calculate initial potential energy (J): • a. Use the equation for potential energy • PE = (mass of ball) X (9.8 m/s2) X (ht of ramp)

  6. Defending Your Conclusions • Use COMPLETE SENTENCES to answer the “Defending Your Conclusions” section of the lab. • Be sure to answer ALL PARTS of the questions, not just a Yes or No…

  7. Jeopardy Teams1B • Team #1: • Team #2: • Team #3: • Team #4: • Team #5:

  8. Chapter 8 Work & Energy

  9. THE RULES: • There will be 5 teams • The host’s decisions are final • Each member of the winning team will receive $1 mole money

  10. And now…here is the host of Jeopardy… Mrs. Elfline

  11. Let’s Get Ready to play… Today’s Categories are:

  12. Definitions

  13. Simple Machines

  14. Critical Thinking

  15. Calculations

  16. Word Puzzles

  17. Definitions Simple Machines Critical Thinking Calculations Word Puzzles $100 $100 $100 $100 $100 FJ $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500

  18. A quantity defined as force X distance Answer…

  19. Work 100

  20. Power is calculated by dividing work by Answer…

  21. Time 200

  22. The ability to do work defines Answer…

  23. Energy 300

  24. The sum of the kinetic and potential energy of large-scale objects in a system is called Answer…

  25. Mechanical Energy 400

  26. The ratio of useful work output to work input is a measure of Answer…

  27. Efficiency 500

  28. What are the 2 families of simple machines? Answer…

  29. Lever and Inclined Plane 100

  30. Levers are divided into how many classes based on the location of the fulcrum? Answer…

  31. 3 200

  32. Where is the fulcrum in a 1st class lever? Answer…

  33. In the middle of the rigid arm. 300

  34. What is the mechanical advantage of a single, fixed pulley? Answer…

  35. 1 400

  36. What class of lever is a bicep muscle? Answer…

  37. 3rd class 500

  38. A boy pushes on a parked car with a force of 200 N but the car does not move. How much work does the boy do on the car? Answer…

  39. 0(No work is done unless the object moves) 100

  40. A quantity that measures how much a machine multiplies force or distance is called Answer…

  41. Mechanical Advantage 200

  42. What is the ability to do work called? Answer…

  43. Energy 300

  44. Gravitational potential energy depends on the:a. Mass of the objectb. Height of the objectc. Acceleration due to gravityd. All of the above Answer…

  45. d. All of the above 400

  46. What is the primary source of the sun’s energy? Answer…

  47. Nuclear Fusion 500

  48. A boy uses a force of 65 N when he lifts a box 1.2 meters. How much work does he do? Answer…

  49. 78 J 100