Work and machines

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Across
  1. 5. inclined plane wrapped around a central cylinder
  2. 6. make work easier
  3. 9. force all machines lose work to
  4. 10. if the machine only changes direction, the mechanical advantage is equal to _____.
  5. 12. force you exert
  6. 16. when a force moves an object in the direction of the force
  7. 17. sloped surface
  8. 18. grooved wheel with a rope wrapped around it
  9. 20. if output force is greater than the input force the mechanical advantage is ____ than one
  10. 21. if output force is less than the input force the mechanical advantage is ____ than one.
Down
  1. 1. rigid bar
  2. 2. force machine exerts
  3. 3. number of times machine multiplies force
  4. 4. bicycle wheel
  5. 7. 2 or more simple machines
  6. 8. fixed point about which a lever pivots around
  7. 11. compares output work to input work - expressed as a percentage
  8. 13. machine that is thick on one end, thin on the other (knife)
  9. 14. how fast work is done
  10. 15. unit of work
  11. 19. unit of power