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Across
  1. 1. one example of this class is a wheelbarrow
  2. 3. one example of this class is a seesaw
  3. 4. (resistance) dr=
  4. 5. f=
  5. 7. fe=
  6. 9. one example of this class is a hockey stick
  7. 10. fr=
Down
  1. 2. de=
  2. 6. w=
  3. 8. d=