Simple Machines

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Across
  1. 4. The number of simple machines
  2. 5. Person who invented simple machines
  3. 7. The force applied
  4. 9. The pivot point in a lever
  5. 10. The resistant force
  6. 12. A rigid bar that pivots over a fixed point
Down
  1. 1. A device that makes life easier
  2. 2. A simple machine
  3. 3. The class of lever if long enough could move the Earth
  4. 6. First Class Lever
  5. 8. A force acting over a distance that moves an object
  6. 11. The number of classes of levers