Simple Machines

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Across
  1. 2. The transfer of energy through motion
  2. 4. A bottle opener is this kind of tool
  3. 7. The point where a lever does not move
  4. 8. The handle of this machine pulls on a cable to wrap it
  5. 10. A wheel with teeth
  6. 13. A wheel that turns and allows a rope to move easily
Down
  1. 1. The unit for work
  2. 3. Energy that causes something to move
  3. 5. The distance from the fulcrum to the load is the load ________
  4. 6. The percentage of useful work done by a machine
  5. 9. This gear turns another gear
  6. 11. Its teeth fit into the links of a chain
  7. 12. A hockey stick is this kind of lever