Linear motion

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Across
  1. 1. speed together with direction
  2. 3. speed time interval
  3. 6. under influence
  4. 8. the rate at which velocity changes
  5. 9. how fast something is moving
Down
  1. 2. speed at any time
  2. 4. frame of reference
  3. 5. the time that has passed
  4. 7. how fast something happens