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Energy Concepts in Physics: Work, Kinetic & Potential Energy, and Conservation Laws

Dive into the essential concepts of energy in physics, including the definitions of work and energy, the differences between kinetic and potential energy, and the fundamental laws of conservation. Explore key equations like those for kinetic and potential energy, understand momentum, and learn about power and energy units. This review encompasses critical topics that lay the foundation for further studies in physics, enhancing your comprehension of energy's role in mechanics.

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Energy Concepts in Physics: Work, Kinetic & Potential Energy, and Conservation Laws

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  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

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