Unit d crossword by Jeremy

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Across
  1. 1. a group of parts that form to perform a general function.
  2. 4. pair of wheels with teeth that interlock.
  3. 6. measure of the amount of force in a given area
  4. 7. force that opposes motion
  5. 9. force applied to operate a machine
  6. 11. force a machine applies to an object
  7. 14. simple machine made up of two wheels of different diameters that turn together.
  8. 16. simple machine made up of a flat surface, such as a board at an angle to another.
  9. 17. simple machine that consists of a cylinder with a groove cut in a spiral on the outside.
  10. 19. system that uses a liquid under pressure to move loads
  11. 20. device that helps us do work. So that means that the shamwow is a machine
  12. 21. belt or chain to transfer energy from an energy source to another
  13. 22. rules of how pressure and force act in water.
  14. 23. measurement of how well a machine or device uses energy.
Down
  1. 1. measure of how the speed of an object is affected by a machine.
  2. 2. purpose or task.
  3. 3. simple machine made up of a wire, rope, or cable moving on a grooved wheel. Can be fixed in place or moved.
  4. 5. smaller groups of parts in a complex machine that perform a specific function
  5. 8. amount by which a machine can multiply a force
  6. 10. system in which simple machines all work together.
  7. 12. simple machine that looks like an inclined plane, but is forced into an object.
  8. 13. simple machine made of a rigid bar or plank that rotated on a fixed object.
  9. 15. special type of linkage for transferring energy from the engine to the wheels in large cars.
  10. 17. tool or device made up of one basic machine
  11. 18. done when a force acts on an object to make it move.everyone has to do this in life.