Presentation on theme: "Work, Power and Energy Review Each table will work as a team to earn points by answering questions. There will be 60 seconds to answer each question from."— Presentation transcript:
Work, Power and Energy Review Each table will work as a team to earn points by answering questions. There will be 60 seconds to answer each question from the time I am done reading unless otherwise noted. Answers will be recorded and presented on the whiteboards at each team table. Correct answers will earn the points denoted by the question. Incorrect answers will not be penalized. The choice of category and question will rotate among teams. At Final Jeopardy, each time may wager all of their earned points, or $1000, whichever is greater. The winning team will earn 1 point of extra credit each on tomorrows test.
Strategy Work together with your team. Talk quietly but discuss possible options. Make sure to write down your solution before time runs out. After each question and answer we will have time to discuss and answer questions.
Work, Power and Energy EnergyConservation of Energy WorkPowerPotpourri Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final JeopardyFinal Jeopardy: Units
$100 Question from Energy ___________ is the energy of an object in motion
$100 Question from Conservation of Energy When a ball is thrown directly upward, which of the following is true? A.Its kinetic energy is mostly converted to potential energy. B.Its potential energy is mostly converted to kinetic energy. C.Its kinetic energy is mostly converted to heat.
$100 Answer from Conservation of Energy A. Its kinetic energy is mostly converted to potential energy.
$200 Question from Conservation of Energy If energy can be neither created nor destroyed, what do we mean when we say Dont waste energy!
$200 Answer from Conservation of Energy Dont convert energy into less useful forms, like heat.
$300 Question from Conservation of Energy When a car rolls down a hill, most of its potential energy converts to kinetic energy. Where does most of the rest of it go?
$300 Answer from Conservation of Energy Heat (from friction)
$400 Question from Conservation of Energy A 2 kg object sits at the top of a 10 m hill. How fast will it be rolling at the bottom of the hill?
$500 Question from Conservation of Energy An object starting with 20 J of potential energy rolls down a hill. At the bottom, 7/8 of the potential energy has been converted to kinetic energy. How much energy (in Joules) was lost due to friction?
Daily Double! You have 30 seconds to submit your wagers.
$100 Question from Power Which of the following is not a definition of power? A.The rate of energy transfer B.How many Joules are converted to other forms of energy C.The rate at which work is done D.How quickly energy is converted
$100 Answer from Power B. How many Joules are converted to other forms of energy (this is a definition of work)
$200 Question from Power Which is more powerful, a student that runs up the stairs or a student that walks? Assume they have equal mass.
$200 Answer from Power A student that runs. Same work, less time.
$300 Question from Power Calculate the power of a machine that can do 2400 J of work in 8 seconds.