Work, Power, Simple Machines

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Across
  1. 6. tells how much a machine can increase force
  2. 7. machine machine made of two or more simple machines
  3. 8. two circular objects of different sizes
  4. 13. a pulley attached to the load
  5. 15. pulley that is attached and doesn't move
  6. 16. an object moves in the direction of the force applied
  7. 17. a bar that pivots at a fixed point
  8. 18. a fixed and movable pulley used together
  9. 19. the rate at which work is done
Down
  1. 1. a machine that is 100% efficient
  2. 2. a straight, slanted surface
  3. 3. A device that makes work easier
  4. 4. SI unit of measure for power
  5. 5. indicates how well a machine overcomes friction
  6. 8. input the work done to a machine
  7. 9. a simple machine that has a fulcrum
  8. 10. an inclined plane wrapped in a spiral
  9. 11. SI unit of measure for work
  10. 12. consists of a grooved wheel that holds a rope or cable
  11. 14. a double inclined plane that moves
  12. 16. output the work done by a machine