Lesson 14: Simple Machines

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Across
  1. 4. brilliant Greek mathematician
  2. 6. a bar that goes up and down over a point
  3. 8. a wheel with a groove; pulling down on rope lifts something
  4. 9. circular band made of rubber
Down
  1. 1. two inclined planes put back to back
  2. 2. any device that changes the amount of force needed to do work
  3. 3. an inclined plane wrapped around a cylinder or cone
  4. 4. rigid bar that's inserted through a hole in a wheel
  5. 5. the point at which a lever rests
  6. 7. a flat surface