Simple machines

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Across
  1. 1. a screw
  2. 4. Staircase
  3. 6. pulley
  4. 9. Handle of a bicycle
Down
  1. 1. an inclined plane wrapped around a cylinder
  2. 2. the point on which a lever rests or is supported and on which it pivots.
  3. 3. Axe
  4. 5. example of a wedge with an inclined plane
  5. 7. A pair of pliers
  6. 8. an example of a lever