simple machines

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Across
  1. 4. the point on which a lever rests and pivots
  2. 6. A wheel with teeth that fit together to transmit motion
  3. 8. a wheel with teeth designed to mesh with other toothed components, typically other gears, to transmit rotational motion and force
  4. 9. A round object that helps things roll
Down
  1. 1. an inclined surface or plane; a slope
  2. 2. Simple machine consisting of a sloping surface
  3. 3. a rotating or non-rotating shaft that supports wheels, allows them to turn
  4. 5. A flat surface tilted at an angle to help move things up or down
  5. 7. flat support surface used to raise objects
  6. 10. a bar used to lift or move something