Falling objects

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Across
  1. 4. Standard unit for measuring acceleration (6,3,6,3,6)
  2. 7. Type of drag that affects falling objects (3,10)
  3. 10. Forces that do not cancel; they cause acceleration
  4. 11. How fast an object is moving; increases during free fall
  5. 14. To apply a force
  6. 15. Motion under gravity with no air resistance (4,4)
  7. 16. Unchanging; describes acceleration in free fall
  8. 18. A quantity with both magnitude and direction, like force
  9. 19. Rate of change of speed; constant during free fall (ignore air)
Down
  1. 1. A force that acts without touching, like gravity (3,7)
  2. 2. Standard unit for measuring speed (6,3,6)
  3. 3. The force of gravity on an object; measured in newtons
  4. 5. Amount of matter in an object; stays the same everywhere
  5. 6. A force that acts at a distance within a region like a gravitational field (5,5)
  6. 8. Forces that cancel out and cause no acceleration
  7. 9. Maximum speed reached when air resistance balances weight (8,8)
  8. 12. The overall force acting on an object
  9. 13. Force that opposes motion through a fluid like air
  10. 17. Force that pulls objects toward Earth