simple machines

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Across
  1. 3. a machine made of slanted surface wrapped around a cylinder
  2. 4. a simple machine of two inclined planes used to cut or split objects
  3. 5. a circular object attached to a rod that helps things turn easily
  4. 6. a wheel with a rope used to lift or pull objects
Down
  1. 1. a machine that has a bar that moves around a fixed point to lift or move objects
  2. 2. a flat surface set at an angle to help move objects up or down more easily