puzzle time

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Across
  1. 3. when gravity is the only thing acting on an object
  2. 5. length over time
  3. 9. when objects move apart, force...
  4. 10. the amount of force pulling the object towards earth
Down
  1. 1. combined forces
  2. 2. a circular motion around another object
  3. 4. a push or pull
  4. 6. when objects get closer, force...
  5. 7. the force pulling all objects towards earth
  6. 8. the amount of matter in an object