Study of Energy: Work, Kinetic Energy, Potential Energy, Heat & Power, Conservation Laws

1. Jeopardy PHY101 Chapter 3 Review Study of Energy

2. Study of Energy

3. Work $100 What is the definition of work? ANSWER

4. Work $200 What are the units of Work? ANSWER

5. Work $300 What is Energy? ANSWER

6. Work $400 What is the difference between kinetic and potential energy? ANSWER

7. Kinetic Energy $100 What is the equation for Kinetic Energy? ANSWER

8. Kinetic Energy $200 What is the equation for momentum? ANSWER

9. Kinetic Energy $300 What is the equation for Kinetic Energy using momentum? ANSWER

10. Kinetic Energy$400 What is the work kinetic energy theorem? ANSWER

11. Potential Energy $100 What is the equation for Potential Energy for gravity? ANSWER

12. Potential Energy $200 What is the equation for Potential Energy for a spring? ANSWER

13. Potential Energy $300 What is the potential energy in a food calorie? ANSWER

14. Potential Energy $400 How much energy would you need to keep a 2200 lbs car moving at 60 miles/hour? ANSWER

15. Heat & Power $100 What is a calorie? What is a BTU? ANSWER

16. Heat & Power $200 What is internal energy? ANSWER

17. Heat & Power $300 What is power? ANSWER

18. Heat & Power $400 What are the units of Power? ANSWER

19. Conservation Laws $100 What is an open system? What is a closed system? ANSWER

20. Conservation Laws $200 What is the Law of Conservation of Linear Momentum? ANSWER

21. Conservation Laws $300 What is the Law of Conservation of Angular Momentum? ANSWER

22. Conservation Laws $400 What is the Law of Conservation of Energy? ANSWER

23. Potpourri $100 At what frequency would you put energy into a system? ANSWER

24. Potpourri $200 What is the impulse momentum theorem? ANSWER

25. Potpourri $300 Complete the table for linear/ angular conversions ANSWER

26. Potpourri $400 What is torque? ANSWER

27. Work$100Answer What is the definition of work? Work is force acting through a displacement where force and displacement are parallel. Work = Force * Displacement = Fd Back to Jeopardy

28. Work$200Answer What are the units of Work? SI 1 N*m = 1 Joule cgs 1 dyne*cm = 1 erg common 1 ft*lb 1 Joule = 107 ergs =0.738 ft*lbs Back to Jeopardy

29. Work$300Answer What is Energy? Ability to do work. Back to Jeopardy

30. Work$400Answer What is the difference between kinetic and potential energy? Kinetic Energy is energy of motion. Potential Energy is energy of position. Back to Jeopardy

31. Kinetic Energy$100Answer What is the equation for Kinetic Energy? K.E. = ½mv² K.E. = ½m(vF² - vO²) Back to Jeopardy

32. Kinetic Energy$200Answer What is the equation for momentum? Momentum = mass * velocity p = mv SI unit 1 kg*m/s Back to Jeopardy

33. Kinetic Energy$300Answer What is the equation for Kinetic Energy using momentum? K.E. = p²/(2m) K.E. =(pF² - pO²)/(2m) Back to Jeopardy

34. Kinetic Energy$400Answer What is the work kinetic energy theorem? WorkNET = K.E. The units are the same for work & energy. Work + K.E. v Work - K.E. v Back to Jeopardy

35. Potential Energy $100Answer What is the equation for Potential Energy for gravity? P.E. = mgy or mgd P.E. =mgy Back to Jeopardy

36. Potential Energy $200Answer What is the equation for Potential Energy for a spring? P.E. = kSx²/2 P.E. = ½kS(xF² - xO²) Back to Jeopardy

37. Potential Energy $300Answer What is the potential energy in a food calorie? 1 Food Calorie = 1 kcal = 4186 J Back to Jeopardy

38. Potential Energy $400Answer How much energy would you need to keep a 2200 lbs car moving at 60 miles/hour? 2200 lbs = 1000 kg 60 miles/hour = 27 m/s K.E. = ½mv² = 360,000 J = 86 kcal A medium sized cookie Back to Jeopardy

39. Heat & Power $100Answer What is a calorie? A calorie is the amount of heat need to raise 1 gram of water 1 degree Celsius. 1 cal = 4.186 J What is a BTU? A BTU is the amount of heat need to raise 1 pound of water 1 degree Fahrenheit. 1 BTU = 252 cal = 1055 J Back to Jeopardy

40. Heat & Power $200Answer What is internal energy? EINT = resistive force * distance = fd We see this as heat. Back to Jeopardy

41. Heat & Power $300Answer What is power? Average Power is Work done/Time Average Power = Work/t Instantaneous Power = force * velocity = Fv Back to Jeopardy

42. Heat & Power $400Answer What are the units of Power? SI 1 J/s = 1 Watt = 1 W cgs 1 erg/s common 1 ft*lb/s 1 W = 107 ergs/s =0.738 ft*lbs/s 1 hp = 745.7 Watts = 550 ft*lbs/s Back to Jeopardy

43. Conservation Laws $100Answer What is an open system? F  0, Energy can go in or out of the system. What is a closed system? F = 0, No energy can go in or out of the system. Back to Jeopardy

44. Conservation Laws $200Answer What is the Law of Conservation of Linear Momentum? p = 0 The momentum of the system before the collision is the momentum of the system after the collision. Back to Jeopardy

45. Conservation Laws $300Answer What is the Law of Conservation of Angular Momentum? L = 0 The angular momentum of the system before the event is the angular momentum of the system after the event. Back to Jeopardy

46. Conservation Laws $400Answer What is the Law of Conservation of Energy? Work Applied Force = K.E. + P.E. + EINT Energy can not be created or destroyed. Back to Jeopardy

47. Potpourri $100Answer At what frequency would you put energy into a system? At resonance. The frequency at which the system naturally vibrates. Back to Jeopardy

48. Potpourri $200Answer What is the impulse momentum theorem? J = Faveraget = p This is used with an open system. Back to Jeopardy

49. Potpourri $300Answer Complete the table for linear/ angular conversions Back to Jeopardy

50. Potpourri $400Answer What is torque? Torque is force acting through a displacement where force and displacement are perpendicular. Torque = t = Force * Displacement = Fd Back to Jeopardy