Work, Energy, and Not-So-Simple Crosswords

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Across
  1. 1. Device that changes force direction or magnitude.
  2. 4. Rotating system reducing force effort.
  3. 6. Sloped surface reducing required force.
  4. 8. Resistance to motion between surfaces.
  5. 9. Rate of doing work.
  6. 10. Inclined plane wrapped around a cylinder.
  7. 11. Stored energy due to position.
  8. 14. Energy of motion.
  9. 15. SI unit of power.
  10. 16. Fixed point of a lever.
  11. 19. Wheel with a rope changing force direction.
Down
  1. 2. Sum of kinetic and potential energy.
  2. 3. Two inclined planes for cutting or splitting.
  3. 5. Ratio of useful work to input energy.
  4. 7. Push or pull on an object.
  5. 12. The capacity to do work.
  6. 13. Force pulling objects toward Earth.
  7. 15. The transfer of energy by force moving an object.
  8. 17. A rigid bar pivoting around a fulcrum.
  9. 18. SI unit of work and energy.