Linear Motion Crossword

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Across
  1. 2. calculated by distance / speed
  2. 5. calculated by speed x time
  3. 7. a measurement with size and direction
  4. 8. the relative size of the difference between an experimental value and the true actual value
  5. 11. the instrument in a car that tells you how fast you're going
  6. 12. SI Unit for time
Down
  1. 1. the speed at any instant
  2. 3. a measurement with size only (no direction)
  3. 4. SI Unit for distance
  4. 6. motion is always ______ to something else
  5. 9. calculated by distance / time
  6. 10. unless otherwise specified, we refer to motion relative to the ______