Simple Machines

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Across
  1. 4. a round tool with threads
  2. 6. a round tool for movement,and its used in pulleys
  3. 7. an apparatus used for carrying out a task
  4. 10. a class of lever
  5. 11. a triangular tool for lifting and lowering objects
  6. 13. a class of lever
Down
  1. 1. a changer of motion for a lever or other machine
  2. 2. a complicated tool
  3. 3. a connector of 2 wheels
  4. 5. a simple machine for lifting things
  5. 8. a description of a lever
  6. 9. an item that needs lifting
  7. 12. force put behind a task
  8. 14. a class of lever