unitD

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Across
  1. 2. is what the device is supposed to do
  2. 4. special type of cell
  3. 7. the force the machine applies the object
  4. 9. is a rigid bar or plank that can rotate around a fixed point called a pivot or fulcrum
  5. 10. is a system in which simple machines all work together
  6. 13. is a cylinder with a groove cut into a spiral on the outside
  7. 14. is a device that helps us do work
  8. 15. uses a liquid under pressure to move loads
  9. 18. is a combination two wheels of different diameter the turn together
  10. 20. force a machine applies to an object
  11. 21. ration is calculated by dividing the input distance by output distance
  12. 23. simple machine made up of wire,rope,or rope moving on a grooved wheel
  13. 24. the principle of transmission of fluid-pressure
  14. 25. is the force that opposes the motion
Down
  1. 1. smaller group of parts within a complex machine the performs a specific function
  2. 3. is the measurement of how well a machine or device uses energy
  3. 5. is a tool or device made up of one basic machine
  4. 6. simple machine made up of a flat surface
  5. 8. simple machine that looks like an inclined plane but is forced into an object
  6. 11. amount by which a machine can multiply
  7. 12. is a group of parts that work together to perform a function
  8. 16. is the part that transfers your your energy from the pedals to the back wheel
  9. 17. is the measure of the amount of force applied to a given area
  10. 18. is done when force acts on objects to make the object move
  11. 19. The size of the gears and the sequence in which they engage define the ratio of the angular velocity
  12. 22. essential components of most mechanical systems