simple machines

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Across
  1. 4. a bar that rests on a fulcrum
  2. 5. an inclined plane wrapped around a cylinder
  3. 6. a wheel attached to a bar(3 words)
Down
  1. 1. two inclined planes put together
  2. 2. a wheel with a rope or chain around it
  3. 3. a flat surface that goes from a high surface to a low surface (2 words)