Unit D Crossword

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Across
  1. 3. device that helps us do work.
  2. 5. simple machine that looks like an inclined plane, but is forced into an object.
  3. 7. purpose or task
  4. 9. a machine smaller group of parts within a complex machine that performs a specific function.
  5. 11. advantage amount by which a machine can multiply a force; calculated by dividing the output force by input force.
  6. 13. plane simple machine made up of a flat surface, such as a board, at an angle to another flat surface, such as ground or a table top; ramp.
  7. 15. system system that uses a liquid under pressure to move loads; device that uses liquids in a confined space to transfer forces; works according to pascal's law.
  8. 17. simple machine that consists of a cylinder with a groove cut in a spiral on the outside.
  9. 18. context in a machine a group of parts that works together to perform a general function, forming a complex machine.
  10. 20. simple machine made up of a rigid bar or plank that rotates on a fixed object called a pivot or fulcrum.
  11. 21. and Axle simple machine made up of two wheels of different diameters that turn together; a longer motion on the wheel produces a shorter but more powerful motion at the axle.
Down
  1. 1. simple machine made up of a wire, rope, or cable moving on a grooved wheel; can be fixed in place or movable.
  2. 2. law is a principle in fluid mechanics that states that a pressure change occurring anywhere in a confined incompressible fluid is transmitted throughout the fluid.
  3. 4. special types of linkage for transferring the energy from the engine to the wheels in large vehicles such as cars and trucks.
  4. 6. measurement of how well a machine or device uses energy; can be calculated by dividing mechanical advantage by speed ratio or by dividing work output by work input.
  5. 7. force that oppose motion.
  6. 8. force force a machine applies to an object.
  7. 9. ratio measure of how the speed of the object is affected by machine; calculated by dividing the input distance by the output distance.
  8. 10. measure of amount of force placed on a object.
  9. 12. belt or chain to transfer energy from an energy source to an object.
  10. 14. machine system in which simple machines all work together; parts of a complex machine that have just one function are called subsystem and often contain a simple machine.
  11. 16. pair of wheels with teeth that interlink; when they rotate together, one gearwheel transfers turning motion and force to the other.
  12. 19. force force applied to operate a machine.
  13. 21. done when a force acts on an object to make the object move; calculated by multiplying force times distance.