Frayed models

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Across
  1. 3. a wheel and axle used to lift loads
  2. 4. the point where the lever rests on wbu but pivots
  3. 6. flat ramp tilted at an angle
  4. 8. wood or metal having one thick end and a thin edge
Down
  1. 1. two or more simple machines operating together
  2. 2. parts rotating together in which the force is transferred
  3. 5. a inclined plane wrapped around a nail
  4. 7. a bar resting on a pivot used to help move heavy things when pressure is applied to another end