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. Work 100

19. Time 200

20. Energy 300

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

22. Efficiency 500

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

24. 3 200

25. 1 400

26. 3rd class 500

27. 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…

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

29. Energy 300

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

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

32. 78 J 100