Machine Puzzle

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Across
  1. 3. a simple machine consisting of two circular objects of different sizes; the
  2. 5. a simple machine that is
  3. 6. force.
  4. 7. the ratio of work output to work input in a
  5. 8. at a fixed point called a fulcrum.
  6. 9. loads; a ramp.
  7. 11. a simple machine that consists of a wheel
  8. 13. which a rope, chain, or wire passes.
  9. 14. is the larger of the two circular objects, and the
  10. 15. A device that helps do work by changing the magnitude and/or direction of an applied force.
Down
  1. 1. a number that tells how many times a machine multiplies
  2. 2. a quantity, usually expressed as a percentage, that
  3. 4. is attached to the center of the wheel.
  4. 10. the point on which a lever pivots.
  5. 12. a simple machine that consists of a bar that