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IPC Review Sheet – Energy PART 1: Definitions 1. energy – involved in every change that occurs 2. kinetic energy – energy in the form of motion 3. potential energy – stored energy due to an objects position 4. Law of Conservation of Energy – states that energy can’t be created or destroyed PART 2: Formulas & Units 5. What is the formula to calculate kinetic energy? KE = mV2 2 6. What is the formula to calculate gravitational potential energy? GPE = m x 9.8 x h 7. What is the unit used to measure kinetic energy? ____Joules______ 8. What is the unit used to measure gravitational potential energy? _____Joules____ 9. What is the unit used to measure mass? ____kilograms____ 10. What is the unit used to measure velocity? _____m/s_____ PART 3: Applying Concepts 11. What happens to the kinetic energy if the mass is increased? ___it increases___ 12. What happens to the kinetic energy if the mass is decreased? ___it decreases___ 13. What happens to the kinetic energy if the velocity is increased? ___it increases___ 14. What happens to the kinetic energy if the velocity is decreased? ___it decreases___ 15. What happens to the gravitational potential energy if the mass is increased? ___it increases___ 16. What happens to the gravitational potential energy if the mass is decreased? ___it decreases___ 17. What happens to the gravitational potential energy if the height is increased? ____it increases_____ 18. What happens to the gravitational potential energy if the height is decreased? ___it decreases___ PART 4: Classifying Types of Energy (Kinetic or Potential) 19. A rock sitting at the top of a cliff ___Potential__ 20. A basketball player running ___Kinetic____ 21. A stretched rubber band ___Potential__ 22. Jumping off of a diving board ___Kinetic____ 23. The energy stored in the chemical bonds in gasoline ___Kinetic & Potential____ PART 5: Label the Pendulum Diagram KE maximized, PE maximized, KE = PE PART 6: Calculations 24. What is the kinetic energy of a man running 15m/s if he has a mass of 98kg? KE = mV2 KE = 98 x 152 KE = 11,025 J 2 2 25. What is the gravitational potential energy of a boy standing on a ladder if he is 10m off the ground and he has a mass of 58kg? GPE = m x 9.8 x h GPE = 58 x 9.8 x 10 GPE = 5,684 J 26. What is the mass of a rock sitting on a cliff 50m high if it has a GPE of 5000J? m = GPE m = 5000 m = 10.2 kg (9.8 x h) (9.8 x 50) 27. What is the height of a book if it has a mass of 8kg and a GPE of 800J? h = GPE h = 800 h = 10.2 m (9.8 x m) (9.8 x 8)
