Isaac Newton

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Across
  1. 1. Subject Newton was good at
  2. 2. Measured in seconds
  3. 4. Mass times acceleration
  4. 5. Study of matter and energy
  5. 8. Earth is one
  6. 9. Branch of math invented by Newton
Down
  1. 1. Newton's first law deals with this
  2. 3. Ability to do work
  3. 6. Resistance to change in motion
  4. 7. Newton wrote three of these