Crossword puzzle

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Across
  1. 1. The velocity of an object at the start of a time interval
  2. 2. Motion at constant speed in a straight line
  3. 8. A coordinate system used to measure position and motion
  4. 9. The rate at which an object covers distance; scalar quantity
  5. 10. The location of an object relative to a reference point
  6. 11. Speed at a specific moment in time
  7. 13. Motion under gravity alone with no air resistance
  8. 14. The total path length traveled by an object regardless of direction
  9. 15. Motion of an object as observed from a particular frame of reference
  10. 17. Displacement divided by total time
  11. 19. A quantity that has magnitude only
  12. 20. An object moving under the influence of gravity only
  13. 23. The difference between two time measurements
Down
  1. 1. Velocity at a specific instant
  2. 3. Change in position of an object with both magnitude and direction
  3. 4. The path followed by a projectile
  4. 5. The rate of change of displacement; a vector quantity
  5. 6. The study of motion without considering forces
  6. 7. Motion with changing speed or direction
  7. 12. Total distance traveled divided by total time
  8. 13. The velocity of an object at the end of a time interval
  9. 16. A quantity that has both magnitude and direction
  10. 18. The rate of change of velocity with respect to time
  11. 21. A person or device measuring motion
  12. 22. A ratio that compares two quantities with different units