Physics Puzzle

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Across
  1. 1. movement along the circumfrence of a circle along a circular path
  2. 3. linear component of speed which is moving in a circular path
  3. 6. state of quality of being efficient
  4. 9. rate of which tangential velocity varies in the motion of an object
  5. 13. straight line thorugh all fixed points
  6. 15. distance from axis to the line of action on a force
  7. 16. straight line from the center of a circle
  8. 18. side by side with the same distance between
  9. 19. force acting outward while rotating
  10. 20. gravity pulling an object toward another
Down
  1. 2. point representing postition of mass
  2. 4. a force surrounding a body
  3. 5. an apparent force that acts outwards while moving along the circumference of a circle
  4. 7. acceleration while traversing a circular path
  5. 8. a course along which something moves
  6. 10. measure of force which an object rotates along an axis
  7. 11. size or extent of something
  8. 12. motion of an object in a circle at a constant speed
  9. 14. angle of 90 degrees
  10. 17. mass measured by interaction with gravity