Simple Machines

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Across
  1. 4. Sloping surface that helps lift heavy objects
  2. 6. Tools that make work easier
  3. 7. Inclined planes wrapped around a cylinder
Down
  1. 1. Circular objects that rotate to reduce friction
  2. 2. Used with ropes to change the direction of a force
  3. 3. Rigid bars that pivot around a point
  4. 5. Tapered tools used to split or cut