Momentum

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Across
  1. 3. weight of something
  2. 4. speed in a particular direction
  3. 5. force over time
  4. 8. two objects come in contact with each other vector quantity with both magnitude and direction
Down
  1. 1. return back to original state
  2. 2. not elastic
  3. 3. mass in motion
  4. 6. all objects moving apart from one another
  5. 7. push or pull to change an object velocity