Chap 8 crossword

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Across
  1. 2. A unit of work equal to one newton-meter
  2. 6. a machine made of more than one simple machine
  3. 8. a slanted surface along which a force moves an object to a different elevation
  4. 9. A simple machine that consists of a rope that fits into a groove in a wheel
  5. 13. The less work a machine has to do to overcome friction
  6. 14. the work done by a machine
  7. 17. an inclined plane wrapped in a spiral around a cylindrical post
  8. 18. work output/work input x 100
  9. 19. output force/input force
  10. 20. the rate at which work is done
Down
  1. 1. A simple machine that consists of a rigid bar that pivots about a fixed point.
  2. 3. Occurs when a force causes a object to move
  3. 4. the work done on a machine
  4. 5. Two different sized circular objects that are attached together and turn as one.
  5. 7. the number of times a machine increases a force exerted on it
  6. 10. An inclined plane that moves
  7. 11. W=Fd
  8. 12. The fixed point around which a lever pivots
  9. 14. A measure of power equal to one joule of work per second.
  10. 15. A device that makes work easier
  11. 16. P=W/t