Anish Motion Vocabulary Crossword puzzle

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Across
  1. 5. a starting point used to describe the position of an object
  2. 7. a measurement of the distance something travels over a period of time
  3. 9. quickness of motion
  4. 11. When the speed of an object remains the same
  5. 12. the amount of matter present in any object or body
  6. 14. the sum of all the forces acting on an object
  7. 16. an action that changes or maintains the motion of a body or object
Down
  1. 1. opposite in direction and equal in size
  2. 2. shows how far an object has travelled in a given time
  3. 3. an invisible force that pulls objects toward each other
  4. 4. forces on a object that are unequal
  5. 6. the SI unit of force
  6. 8. the action or process of moving or being moved
  7. 10. a quantity that can change or vary
  8. 13. The rate of change of position of an object in any direction
  9. 15. the resistance of motion when one object rubs against another