Simple Machine Crossword

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Across
  1. 3. d=?
  2. 4. work is measured in
  3. 6. a device that makes work easier with only one movement.
  4. 7. moveable and ...pulleys
  5. 10. first class, second class, and third class
Down
  1. 1. f=?
  2. 2. a ramp is an example of
  3. 5. fr/fr
  4. 8. de/dr
  5. 9. w=?