Not just kinematics

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Across
  1. 3. Our lightest ball
  2. 7. the consequence of F/m
  3. 8. not still
  4. 9. F=ma
  5. 12. energy of motion
  6. 13. how you should do algebra
  7. 14. bendy energy
  8. 15. Our heaviest ball
  9. 16. not a green house gas
  10. 17. Found between North and Central
  11. 18. we are all together, every day
  12. 19. greek letter or the cat's
Down
  1. 1. the best physics app
  2. 2. Stored energy
  3. 4. 8p+8n
  4. 5. the effect caused by too much CO2
  5. 6. 1000 grams
  6. 8. 1/1000 of a gram
  7. 10. Conserved quantity
  8. 11. a:b::c:d, comparison