Work crossword

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Across
  1. 2. the rate at which work is done
  2. 5. the unit for power
  3. 6. the fixed point in which a lever moves
  4. 8. input the work you do on a machine
  5. 11. occurs when a force causes an object to move
  6. 12. output force divided by input force
  7. 15. a device that helps make work easier
  8. 16. a bar that pivots at a fixed point
  9. 17. the unit used to express work
Down
  1. 1. work output divided by work input
  2. 3. work divided by time
  3. 4. a straight slanted surface
  4. 5. force times distance
  5. 7. more than one machine
  6. 9. output the work done by a machine
  7. 10. a double inclined plane that moves
  8. 11. two different sized circles
  9. 13. a grooved wheel with a rope
  10. 14. a inclined plane that is wrapped in a spiral