Simple machines

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Across
  1. 3. The energy used to lift an object through a given distance
  2. 4. The type of technology where severely disabled people can use their breath to control a computer, wheelchair or other machines.
  3. 5. The type of energy n object has when it is moving
  4. 6. The cause of many disabilities, left behind after war or conflicts
  5. 7. links the two gears on a bicycle
  6. 9. The relationship between the number of teeth on two connected gears
  7. 11. The units for force
  8. 13. The type of energy an object has from its position relative to the ground
  9. 15. The ratio of effort to load in a four pulley system
Down
  1. 1. Can be calculated by workdone divided by vertical distance
  2. 2. One of two possible directions a moment can act
  3. 8. Calculated by force multiplied by distance from a pivot
  4. 10. The units of energy
  5. 12. A wheel with teeth around it
  6. 14. The units of a turning effect