Simple machine

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Across
  1. 2. Capacity of doing worK
  2. 4. A sharp-edged simple machine
  3. 7. Helps reduce effort by increasing distance
  4. 10. A lever with load in the middle
  5. 11. Force applied to a machine
  6. 15. Energy used when force moves an object
  7. 16. A tool that helps us do work easily
  8. 17. Unit of energy
  9. 19. A bottle opener is an example of which machine?
Down
  1. 1. Plane A sloping surface used to move objects up
  2. 3. A machine made of two or more simple machines
  3. 4. A round object that helps things roll
  4. 5. A simple machine used in jar lids
  5. 6. The force that is lifted or moved
  6. 8. A wheel with a rod at its center
  7. 9. A stiff bar resting on a support
  8. 12. A lever with fulcrum in the middle
  9. 13. Human forearm works as which type of lever
  10. 14. The turning point of a lever
  11. 18. A simple machine used to lift water from a well, Pulley