Do Now

1. Do Now • Complete the Do Now questions on your Daily Organizer and make sure your homework is turned in: • A 4000 kg airplane is 1500 m above the ground flying at 25 m/s. • What type(s) of energy does it have? How do you know? • Calculate the values for each type of energy it has.

2. Important Dates/Reminders • Last Week’s Homework Should Be In Bin • Homework Due Wednesday • Update Lab Comp Books • College Ready Mid Year Reset Papers • Tutoring Today 4 – 5 PM • Roller Coaster Project Materials • Home Basketball Game Tue vs. MAHS!!!!

3. Total Mechanical Energy • Mechanical energy is the energy that is possessed by an object due to its height or do its speed.

4. Total Mechanical Energy • Mechanical energy is the energy that is possessed by an object due to its height or do its speed. • Mechanical energy can be either potential energy OR kinetic energy OR both

5. Total Mechanical Energy • An object that possesses mechanical energy is able to do work • Total Mechanical Energy is the sum of the potential and kinetic energies • TME = KE + PE

6. Example • TME = KE + PE • Find the total mechanical energy for the Do Now example (4000 kg airplane 1500 m above the ground flying at 25 m/s)

7. Example • TME = KE + PE • Find the total mechanical energy for the Do Now example (4000 kg airplane 1500 m above the ground flying at 25 m/s) • KE = ½ (4000 kg)(25 m/s)2 • PE = (4000 kg)(9.8 m/s2)(1500 m)

8. Guided Practice • TME = KE + PE • What is the total mechanical energy for a 6 kg bird travelling at 9 m/s when it is 23 m above the ground?

9. Complete the two independent practice problems. When finished, get work checked & complete exit ticket. Independent practice

11. Ms. Kemal’s Physics Jeopardy

12. THE RULES: • Give each answer in the form • of a question (i.e. “What is…”) • Instructor/Host’s decisions are • FINAL

13. And now…here is the host of Jeopardy… Ms. Kemal

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

15. Work

16. Power

17. Kinetic Energy

18. Potential Energy

19. Mystery Bag

20. Work Power Kinetic Energy Potential Energy Mystery Bag $100 $100 $100 $100 $100 FJ $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 DD $500 $500 $500 $500 $500

21. Work occurs when a _____________ is applied over a certain distance. Answer…

22. Force 100

23. The three things work depends on Answer…

24. Force, displacement, angle between force and displacement 200

25. Is it positive, negative or zero work when your force and displacement are in opposite directions? Answer…

26. Negative 300

27. The work done when an applied force of 7.5 N causes an object to be displaced 4 m. Answer…

28. 30 J 400

29. The work done when a 3.0 kg box is lifted 5.1 m. Answer…

30. 150 J 500

31. Define power Answer…

32. The rate that work happens 100

33. The unit for power Answer…

34. Watts 200

35. The two equations to find power Answer…

36. P = FvP = W/t 300

37. The power required to do 3300 J of work on an object for 11 seconds. Answer…

38. 300 W 400

39. The power used to move a 4 kg object 9 m in 3 seconds. Answer…

40. 117.6 W 500

41. Define kinetic energy. Answer…

42. Energy in motion 100

43. What kinetic energy depends on Answer…

44. Mass and velocity 200

45. The kinetic energy of a 2.4 kg football flying through the air at 17.6 m/s Answer…

46. 371.7 J 300

47. If your initial kinetic energy was 100 J and then you doubled the mass, this would be the new kinetic energy Answer…

48. 200 J 400

49. Find the speed of a 4 kg kite that has a kinetic energy of 32 J. Answer…

50. 4 m/s 500