Newtons law

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Across
  1. 4. Tendency of an object to resist changes in motion (8 letters)
  2. 7. Rate of change of velocity over time (12 letters)
  3. 8. Relationship where one quantity varies directly with another (15 letters)
Down
  1. 1. Something done or performed (6 letters)
  2. 2. Response to a stimulus or action (8 letters)
  3. 3. Push or pull that can change an object's motion (5 letters)
  4. 5. A state of balance or stability (11 letter)
  5. 6. Amount of matter in an object (4 letters)
  6. 9. State of inactivity or relaxation (4 letters)