Energy crossword

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Across
  1. 3. SI unit of work
  2. 7. ratio of useful to all energy output
  3. 10. ratio of input and output force
  4. 11. property of an object that enables it to do work
  5. 13. energy of position
  6. 14. energy can never be created or destroyed
  7. 15. machine that uses a bar on a fixed point
Down
  1. 1. product of a force and distance of an object
  2. 2. energy due to the movement or postition of an object
  3. 4. rate work is done
  4. 5. pivot point of a lever
  5. 6. device to increase/decrease force
  6. 8. energy of motion
  7. 9. SI unit of power
  8. 12. type of lever with a groove