Simple Machine

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Across
  1. 1. formula for the mechanical advantage of an inclined plane is
  2. 3. is the fulcrum in the class 3 lever
  3. 6. 1 gear system
  4. 7. example one of the simple machines
Down
  1. 2. many class lever systems are there
  2. 4. of class 3 lever
  3. 5. example of where wedge can be used